Gage Lee Jump was originally signed by A's scout Kelcy Mucker…graduated from JSerra Catholic High School in San Juan Capistrano, Calif…was originally drafted by San Diego in the 18th round in 2021 but opted to attend UCLA…pitched for the Bruins in 2022, did not pitch in 2023 following "Tommy John" surgery, and transferred to LSU in 2024…was 7-3 with three saves and a 3.53 ERA in 24 games, including 18 starts, in two seasons in college…struck out 123 in 99.1 innings.
2025
Began his professional career with High-A Lansing and was 4-1 with a 2.32 ERA in six games, including five starts, when he was promoted to Double-A Midland in mid-May…went 5-6 with a 3.64 ERA in 20 games, 19 starts, with the RockHounds…was a combined 9-7 with a 3.28 ERA and .598 opponents OPS in 26 games, including 24 starts, overall...Struck out 131 batters in 112.2 innings (10.46 per nine innings) and walked just 34 (2.72) for a strikeout-to-walk ratio of 3.85…allowed just seven home runs (0.56 per nine innings)…had 10 wild pitches...Ranked second in the A's farm in strikeouts, tied for second in wins, tied for fifth in games started and seventh in innings pitched…had one of four complete games and one of three shutouts...Was named the A's Organizational Pitcher of the Year...Went 0-1 with a 9.00 ERA over his first two starts, 8-0 with a 0.72 ERA over an eight-game stretch from April 18 to May 31 and 1-6 with a 4.92 ERA over his final 16 appearances...Allowed a .214 opponents batting average, which broke down to .211 (30-for-152) with a .576 OPS against left-handed hitters and .215 (60-for-279) with a .610 OPS against right-handers...Opponents hit .323 with runners in scoring position…they batted .278 with six of his seven home runs with runners on base compared to .175 with the bases empty...Combined to go 5-3 with a 2.23 ERA in 14 games in his home ballparks and allowed just two home runs in 60.2 innings…was 2-0 with a 1.15 ERA in three games at Lansing's Jackson Field and 3-3 with a 2.60 ERA in 11 games at Midland's Momentum Bank Ballpark…was 4-4 with a 4.50 ERA in 12 starts on the road...Was 2-0 with a 1.93 ERA in four starts during the day, 7-7 with a 3.54 ERA in 22 games at night...Went 1-1 with a 1.59 ERA in four starts on four days rest, 4-4 with a 2.51 ERA in 13 starts on five days rest and 4-2 with a 5.94 ERA in his other nine appearances...As a starter, had a .197 opponents batting average and five of his seven home runs the first time through the batting order, .279 the second time and .119 after that...Yielded a .116 batting average with two strikes…opponents were 1-for-50 (.020) with 33 strikeouts on an 0-2 count...His teams were 15-9 (.625) in his starting assignments…tossed five innings or fewer in 18 of his 24 starts, including 14 starts of fewer than five innings…picked up the win in nine of the 11 starts in which he had enough innings to qualify for the victory…had nine starts without a walk and six more with just one...Was rated as the A's No. 3 prospect by MLB.com following the season.
