Griffin is a Captain in the U.S. Air Force Reserve, earning the promotion in June 2021 and remains the only Air Force Academy graduate to play in the majors…his younger twin brothers, Capt. Parker “Mad” Jax and Capt. Carson Jax and his sister-in-law, Capt. Chandler “Goldie” Jax, are all active duty pilots, and all four attended the Academy together…Griffin’s wife, Savannah, is also an Air Force Captain and has completed a tour of duty in Afghanistan..In 2024, the Jax family participated in a pregame flyover above Target Field to commemorate the Sept. 11, 2001 attacks, with Parker and Chandler flying F-35 Lightning II jets from the 421st “Black Widows” Fighter Squadron and Carson throwing a ceremonial first pitch to Griffin on the ground...During his time at the Air Force Academy, Griffin never piloted a mission himself, but he did fly in an F-16 as part of a “familiarization flight”…he also jumped out of planes over 200 times during his Academy days...His father, Garth, is a Florida State University product who played 11 seasons as a linebacker for the NFL’s Dallas Cowboys (1986-88) and Arizona Cardinals (1989-95)…during his time with the Seminoles, he was teammates with future Pro Football Hall of Famer Deion Sanders...Griffin and Savannah, who were married in 2021, have two daughters..,.In January, he was officially selected to pitch for Team USA at the 2026 World Baseball Classic…he and Pirates ace Paul Skenes coordinated tickets for the Air Force Academy baseball team to attend Team USA’s pool play win over Mexico.
2025
Made a career-high 73 appearances, including two starts, between the Twins (50G) and Rays (23G), going a combined 1-7 with a 4.23 ERA (66.0IP, 31ER)…also set career bests in strikeouts (99) and holds (28)…acquired at the July 31 trade deadline for RHP Taj Bradley...Joined HOU Bryan Abreu as the only pitchers in the Majors to make 70 appearances or more in each of the last three seasons (2023-25)…his 216 appearances in that timeframe rank third to SF/NYM Tyler Rogers (226G) and Abreu (220G)...Of his 99 strikeouts, 97 came as a reliever, fourth most in the AL behind HOU Bryan Abreu (105), CLE Cade Smith (104) and teammate Edwin Uceta (103)…among AL pitchers (min. 250BF), his career-high 35.0 pct. strikeout rate was third to KC Cole Ragans (38.1%) and Abreu (35.5%)...Min. 250 BF, his AL-leading 38.1 pct. chase rate was second in the majors behind CIN Graham Ashcraft (38.3%)…under the same parameter, his 37.3 pct. whiff rate was fifth in MLB, trailing TOR Brendon Little (43.5%), NYM Edwin Díaz (41.5%), HOU Bryan Abreu (41.2%) and NYY Devin Williams (37.7%)…registered 201 whiffs as a reliever, seventh most in the AL...His 73 appearances tied for sixth most in the AL…did not permit a baserunner in a career-high-tying 29 of those outings (also: 2024), tied for sixth most in the AL/tied for 15th in MLB...Opponents hit .275 (36-for-131) with a .427 slugging pct. against him in home games vs. .222 (28-for-126) and .341, respectively, on the road…six of his seven losses came on the road, most among MLB relievers...Held opponents to a .135 (10-for-74) clip with two outs, tied with TEX Hoby Milner for fourth best in the AL (min. 70AB) behind SEA Gabe Speier (.117), BOS Aroldis Chapman (.127) and KC Carlos Estévez (.132)...includes a 4-for-27 (.148) clip with RISP and two outs...Recorded a 3.35 ERA (45.2IP, 17ER) across 50 appearances opposite AL foes compared to a 6.20 ERA (20.1IP, 14ER) in his career-high 23 Interleague outings...Tallied 59 of his 99 strikeouts on sweepers, most by an MLB reliever and tied for fifth most among all pitchers…trailed only BOS Garrett Crochet (89) in the AL…his career-best 46.5 pct. whiff rate on sweepers ranked second in the majors (min. 150 swings) to MIA Ronny Henriquez (46.6%)...Oponents hit a combined .208 (37-for-178) against his sweeper and changeup and .342 (27-for-79) vs. his other four offerings (four-seamer, sinker, cutter, curveball)...Yielded a career-high three walk-off RBI, all on singles…entered the year having allowed one walk-off in his career: April 17, 2024 at BAL (Cedric Mullins two-run HR)...Made his third straight Opening Day roster, all with the Twins (2023-25)...Recorded 14 appearances in May, tying August 2022 for the most in any month of his career, going 1-0 with a 1.32 ERA (13.2IP, 2ER)…his 21 SO during the month were second most of his career to August 2021 (22), when he was a member of the Twins starting rotation...Recorded 13 holds in his first 22 appearances through May 16, tying KC Lucas Erceg for the Major League lead in that span…had 15 holds in his next 51 outings from that point on...Struck out 42 batters in his first 27 outings through the end of May, most among MLB relievers, ahead of CLE Cade Smith (41)...On July 30 vs. BOS, yielded three runs and did not record an out in his final appearance for the Twins…marked his 50th outing of the year, making him the 17th pitcher in Twins/Senators history (1901–pres.) to record 50 appearances or more for the club in four separate seasons...On Aug. 3 vs. LAD, made his Rays debut in the ninth inning of a 3-0 loss, permitting one run via a Mookie Betts sacrifice fly after a 10-pitch battle...On Aug. 6 at LAA, allowed his first three batters to reach before recording three consecutive swinging strikeouts on 14 pitches, leaving the bases loaded to preserve a 5-4 lead through eight innings…threw a season-high-tying 25 pitches (also: July 25 vs. WSH, Aug. 3 at LAD)...On Aug. 13 at ATH, fanned each of his 3 BF in a scoreless eighth frame, posting a season-high five whiffs, which he later matched on Aug. 27 at CLE...marked the only time he struck out the side in order after joining the Rays...Turned in a 0.90 ERA (10.0IP, 1ER) across 11 appearances (2 starts) in September, third lowest in any calendar month of his career (min. 10.0IP) to August 2024 and June 2023 (both 0.00)…ended the season with 10 consecutive scoreless appearances, tied for the fifth-longest season-ending streak by an AL reliever in 2025…the stretch dropped his ERA with the Rays from 7.20 to 3.60…retired 20 of his final 22 BF to conclude the campaign...On Sept. 5 vs. CLE, started as an opener for Ian Seymour, working around a pair of hits for a scoreless inning…marked his first start since Oct. 2, 2021 at KC…also started a bullpen game on Sept. 10 at CWS, retiring three of his four batters on six pitches...On Sept. 13 at CHC, tallied his 400th career strikeout, fanning Dansby Swanson to conclude the sixth inning.
2024
Made Twins Opening Day roster for second time in career and second consecutively...Began season splitting closer role duties with Brock Stewart as Jhoan Duran began season on Injured List; Jax recorded four saves in four opportunities in April...Recorded save on Opening Day on March 28 at Kansas City, pitching one scoreless inning to close out a 4-1 Twins Opening Day victory...14 of first 16 appearances were scoreless from March 28-May 3, posting a 1.93 ERA (14.0 IP, 3 ER) in that span...Moved back to setup role upon Duran’s return and recorded holds in nine of 15 appearances from April 28-June 2...Posted an ERA of 1.50 ERA (12.0 IP, 2 ER) in 12 June appearances, with 17 strikeouts...Allowed just two home runs in first 45 appearances, from March 30-July 20...Made 200th career appearance on July 21 vs. Milwaukee...Held opponents scoreless in season-long 15-straight appearances from July 23-Aug. 30 (14.1 IP), second longest of career...Set season high with two innings on Sept. 4 vs. Los Angeles-AL, holding Angels scoreless with one walk and three strikeouts while throwing just 20 pitches...was his longest outing since June 4, 2022 at Chicago-AL (also two innings)...Struck out 300th career batter on Sept. 19 at Cleveland, fanning Daniel Schneemann...Held right-handed batters to a .169 average with a .471 OPS, compared to .200 average with a .564 OPS vs. left-handed batters...Set career-highs in saves (10), games (72), holds (24) and strikeouts (95)...Twins were 51-21 in his appearances...led team in games overall with 72...Finished with 10 holds, ranking 10th most in Twins history for single season...tied for seventh-most in AL...Posted a 12.04 strikeouts-per-9.0 innings pitched ratio, the fourth-best in a single season in club history (Joe Nathan - 2006, 12.51; Jhoan Duran - 2003, 12.13; Nathan - 2005, 12.09)....ranked 10th in the AL in strikeouts-per-9.0 innings pitched (12.04)...Was one of three pitchers in baseball with at least 10 saves, 20 holds, a batting average against of under .200 and a strikeouts-per-9.0 innings pitched ratio of at least 12.00, the others being Aroldis Chapman and Jeff Hoffman...only pitcher in Twins history with those numbers in single season...in fact, only pitcher in Twins history with at least 10 saves and 20 holds in one season...Ranked in the 99th percentile in baseball in xERA (2.34) and chase percentage (38.3%), 98th percentile in whiff percentage (37.8%), 97th percentile in xBA (.189) and strikeout percentage (34.4%) and 91st in average fastball velocity (97.0 mph)...Posted an overall pitching run value figure of 18, ranking in the 93rd percentile in baseball...breaking ball run value was seven (90th percentile), fastball run value was nine (85th percentile) and offspeed was two (76th percentile)...Held opponents to a batting average of .133 (2-for-15) against curveball, .156 (12-for-77) against 4-seamer, .173 (9-for-52) against changeup, .208 (5-for-24) against sinker and .216 (19-for-88) against sweeper...highest putaway percentage pitch was sinker (30.0%)...highest whiff rate was on changeup (47.6%)...Recipient of Joseph W. Haynes Award for Twins Pitcher of the Year, an award voted on by the Twin Cities chapter of the BBWAA.
2023
Made Twins Opening Day roster for first time in career and spent season in Minnesota’s bullpen...Appeared on Opening Day on March 30 at Kansas City, pitching 1.0 scoreless eighth inning and earning a hold in a Twins 2-0 victory...Pitched in 100th career game on May 10 vs. San Diego, earning the win while escaping a bases-loaded jam with a strikeout of Matt Carpenter...Went 2-0, 0.00 ERA (10.2 IP) with four hits allowed, one walk and eight strikeouts in 11 June games...Posted team-best and career-best 19.1-inning scoreless streak from May 22-July 15...Recorded first save of season on June 14 vs. Milwaukee...Finished with four saves, second most on team...The other saves were Aug. 24 vs. Texas, Sept. 20 at Cincinnati and Sept. 27 vs. Oakland...Allowed first home run of season on July 19 at Seattle, a Eugenio Suárez two-run homer, snapping a string of 41-straight appearances without allowing a homer...Snapped a 38.2-inning homerless streak to start season and first in 48.1 innings, dating back to 2022, the fourth-longest streak in MLB at time...Recorded at least one strikeout in 15-straight appearances from Aug. 24-Sept. 30...Longest for a Twin on season...Recorded a hold in 17 of 34 outings from June 11-Sept. 8, becoming Twins primary set-up man for Jhoan Duran...Struck out multiple batters in 17 of 71 appearances...Issued 10 losses on season, tied for most among AL relievers...But won six games in relief, tied for eighth most in the AL among relievers...Twins were 42-29 in games in which he appeared, including a 24-8 record after the All-Star break...Held right-handed batters to a .228 batting average with a .599 OPS, compared to a .238 batting average and a .697 OPS vs. left-handed batters...Led Twins and tied for ninth in AL in holds (23)...Set career-highs in games (71) and holds (23)...Ranked in the 97th percentile in baseball in barrel percentage (3.3%)...Ranked in the 94th percentile in groundball percentage (56.8%) and in xERA (2.88)...Ranked in the 89th percentile in average fastball velocity (86.8 mph)...Threw sweeper 553 times on season, 11th most in baseball...Held opponents to a .197 (29-for-147) average on sweeper, striking out 47 batters...Sweeper made up 53.3% of his pitches, second highest percentage in baseball (minimum of 500 pitches)...Made four postseason appearances for Twins, two in the ALWCS vs. Toronto and two in the ALDS vs. Houston...Made postseason debut on Oct. 3 vs. Toronto in Game 1 of ALWCS, pitching 1.0 scoreless eighth inning, with two strikeouts, earning the hold in a Twins 3-1 victory...Earned another hold in Game 2 with 1.0 scoreless eighth inning...Appeared in two ALDS losses vs. Houston, combining to pitch 1.2 scoreless innings with three strikeouts vs. Astros.
2022
Was in Twins spring training and optioned to Triple-A St. Paul April 7...Began season with Saints and appeared in one game prior to being recalled by Minnesota April 12 (Jorge Alcala - IL)....Pitched exclusively out of the Twins bullpen after beginning major league career in starting role in 2021....Earned first career save April 28 vs. Detroit, pitching 3.0 shutout innings, a season-high...Became one of club’s primary setup men in May and earned first career hold May 2 at Baltimore....Went 1-2, 1.38 ERA (13.0 IP, 2 ER) with one walk, 18 strikeouts and a .098 opponent batting average in 12 June games....19 of final 23 appearances on season were scoreless from Aug.13-Oct. 3 (1.71 ERA)....Struck out at least one batter in 51 of 65 outings and multiple batters in 23 outings....Allowed just one home run in final 23 appearances from Aug. 13-Oct. 3 (Sept. 7 at New York-AL - Gleyber Torres)...Twins went 38-27 in games in which he appeared, a .585 winning percentage, second-highest among Twins pitchers (Jhoan Duran - .719)....Held left-handed batters to a .189 average, compared to .224 against right-handed hitters....Opponents hit .187 (28-for-150) with 56 strikeouts against his slider....Posted a breaking pitch average velocity of 86.1 mph, a 3.6 mph increase compared to 2021 (82.5 mph), the fourth-best improvement in baseball....Threw fastball at average speed of 95.4 mph, a 2.8 mph increase compared to 2021 (92.6 mph), the highest in baseball, ahead of teammate Jorge López (second place - 2.3 mph increase)....Ranked in the 86th percentile in baseball in fastball spin rate at 2391...ranked in the 87th percentile in baseball in chase rate at 33.3%.....Ranked 14th among AL relievers in strikeouts (78)....Tied for first on Twins staff in holds (18), along with Jhoan Duran and Caleb Thielbar...ranked second on club in appearances (65)...led all Twins relievers in innings pitched (72.1).
2021
Was an invite to Twins spring training, the first of his career; reassigned to minor league camp on March 23...Began season at Triple-A St. Paul and was the Saints’ number four starter, opening his season on May 7 vs. Omaha, allowing one run on four hits in 5.0 innings pitched, with three walks and two strikeouts (ND)...Made five starts for the Saints in May and had contract selected by Minnesota on June 5, the first of four stints with the Twins on the season...was also notified about his promotion to Captain in the Air Force on June 5, his first day in the majors...Made major league debut on June 8 vs. New York-AL, pitching 1.0 inning of relief, allowing three runs on three hits, with one strikeout...fanned Tyler Wade for first career strikeout...Earned first major league win on June 25 vs. Cleveland, allowing three runs on three hits in 4.1 innings of relief in a Twins 8-7 victory...Made first major league start on July 3 at Kansas City, allowing six runs on eight hits in 5.0 innings pitched and was dealt the loss...Transferred back and forth from Minnesota to St. Paul from late June to late July but eventually became part of Twins starting rotation from July 30 to end of season...Went 2-0, 2.73 ERA (26.1 IP, 8 ER) with seven walks, 21 strikeouts, and a .188 (18-for-96) opponent batting average in -five-start span (2 QS) from July 19-Aug. 16, including wins in back-to-back starts on Aug. 5 at Houston and Aug. 10 vs. Chicago-AL...Set season and career-high with 10 strikeouts on Aug. 10 vs. Chicago-AL (6.0 IP, 83 pitches)...became first Twins rookie with 10-plus strikeout game since Trevor May on Sept. 14, 2014, at Chicago-AL (also 10 K)...also became the second Twins pitcher since at least 1988 with at least 10 strikeouts and 83-or-fewer pitches thrown in a start, joining José Berríos (11 K, 81 pitches) on July 31, 2019, at Miami...Became the first player or coach in Twins history (since 1961) to wear uniform number 83...Named recipient of 2021 Bob Feller Act of Valor Award; presented with award prior to nightcap on September 14 vs. Cleveland...award honors major leaguer who embodies spirit of late Hall of Famer Bob Feller, both in terms of commitment to country and love for baseball...Combined to go 8-6, 5.50 ERA (122.2 IP, 75 ER) with 45 walks, 101 strikeouts and .252 opponent batting average in 26 games between St. Paul and Minnesota.
2020
Did not play an official professional game and was left off the Twins’ 60-man Player Pool...Participated in Twins Fall Instructional League during October in Ft. Myers, FL
2019
Began season with Double-A Pensacola...named Southern League Pitcher of the Week twice with Blue Wahoos: May 5 (1-0, 0.75 ERA, 12.0 IP, 1 ER, 3 BB, 7 K) and June 30 (1-0, 0.69 ERA, 13.0 IP, 1 ER, 2 BB, 8 K)...named Southern League Midseason All-Star...went 2-2, 1.92 ERA (51.2 IP, 11 ER) with 11 walks and 34 strikeouts in 10 starts pre-break...promoted to Triple-A Rochester August 6 for three starts, going 1-2, 4.50 ERA (16.0 IP, 8 ER) with three walks and 10 strikeouts...transferred back to Pensacola August 20 and made two starts to finish the season...combined to go 5-7, 2.90 ERA (127.1 IP, 41 ER) with 27 walks and 94 strikeouts in 23 starts between the two levels...held right-handed batters to a .225 batting average and left-handers to a .264 average...named best control in Twins minor league system by Baseball America following season.
2018
Spent season with Single-A Ft. Myers after being activated from the Military List on June 1...allowed three earned runs or fewer in nine of his first 10 appearances with a 3.41 ERA (60.2 IP, 23 ER)...played for Salt River Rafters of the Arizona Fall League, going 1-1, 3.86 ERA (21.0 IP, 9 ER) with 11 walks and 14 strikeouts in six games (5 starts)...following season was named Air Force Academy Male Athlete of the Year.
2017
Made five starts between Rookie-Elizabethton and Single-A Cedar Rapids, combining to go 2-2, 2.61 ERA (31.0 IP, 9 ER) with seven walks and 20 strikeouts...placed on Military List July 26 for remainder of season.
2016
Began professional career with Rookie-Elizabethton, appearing in four games, all in relief, striking out eight in 8.2 innings pitched.
