Jump (6-10) allowed two runs on six hits and struck out seven without walking a batter over four innings to take the loss versus the Mariners on Sunday.
Jump wasn't particularly efficient, needing 82 pitches (60 strikes) to get through his four frames. He's fallen short of the five-inning mark in four of his last seven outings, giving up 27 runs over 33.2 innings with a 38:20 K:BB in that span. The 23-year-old southpaw is at a 5.12 ERA, 1.49 WHIP and 106:45 K:BB through 96.2 innings over 19 starts in the majors this year. He has totaled 134.2 innings between the majors and Triple-A in 2026, up from 111.2 frames between Double-A and High-A in 2025, so there may be some intent from the Athletics to keep his outings short. He's tentatively projected to make his next start at home in a rematch with the Mariners.
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Athletics' Gage Jump: Struggles in ninth loss
Rotowire
Jump (6-9) took the loss Monday, allowing seven runs on six hits and three walks over 4.1 innings against Texas. He struck out two.
Jump worked a scoreless first inning but couldn't keep Texas off the board in any of the next four frames, departing at 91 pitches (53 strikes). The southpaw got off to a solid start in his big-league career but has hit a wall in the second half, compiling a 6.95 ERA, 1.70 WHIP and 51:30 K:BB over 44 innings (nine starts) since the All-Star break. He'll take a 5.15 ERA, 1.49 WHIP and 99:45 K:BB across 92.2 innings (18 starts) into his next outing, lined up for the weekend against Seattle.
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Athletics' Gage Jump: Strikes out nine Tuesday
Rotowire
Jump (6-8) earned the win after Tuesday against the Twins, allowing two runs on three hits and two walks while striking out nine over 6.1 innings.
Jump kept Minnesota scoreless through six innings before running into trouble in the seventh, when he allowed two runs before being lifted. The left-hander still delivered one of his best performances of the season, pitching into the seventh for the first time since June 18 while generating nine strikeouts, his second-highest total of the year. Jump has now allowed three earned runs or fewer in three of his last four starts. He's lined up to make his next start next week against the Rangers.
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Athletics' Gage Jump: Snaps losing streak
Rotowire
Jump (4-6) earned the win Tuesday against the Red Sox, allowing three hits and four walks while striking out seven over six scoreless innings.
Jump threw only 53 of his 90 pitches for strikes and issued four walks for the second consecutive start, but he overpowered Boston by generating 19 whiffs. He finished the outing by striking out four of the final six batters he faced and secured his first win since June 18 after dropping five straight decisions. During that losing streak, Jump surrendered 22 runs (20 earned) across 21.2 innings, causing his ERA to climb over two full runs. He now owns a 4.00 ERA, 1.40 WHIP and 68:25 K:BB across 63 innings this season and is scheduled to make his next start Sunday against the Tigers.
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Athletics' Gage Jump: Struggles again Sunday
Rotowire
Jump (3-3) allowed six runs on eight hits and three walks while striking out one over three innings to take the loss Sunday versus the Marlins.
Jump gave up a pair of home runs, accounting for half of the runs on his line. He's now struggled in consecutive starts, giving up 11 runs on 19 hits and three walks over his last 7.2 innings, though both starts came at hitter-friendly Sutter Health Park in Sacramento. Jump is at a 3.98 ERA, 1.30 WHIP and 41:13 K:BB through 43 innings over his first eight major-league starts. He's tentatively projected to make his next start on the road versus the White Sox.
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Athletics' Gage Jump: Not up to challenge from Dodgers
Rotowire
Jump (3-2) allowed five runs on 11 hits and struck out five without walking a batter over 4.2 innings to take the loss Monday versus the Dodgers.
Jump had walked at least one batter in each of his first six starts. The Dodgers didn't waste time with the bats, as the 11 hits were a season high against Jump, who wasn't up to the challenge of one of the most fearsome lineups in baseball. Despite his poor performance Monday, the rookie southpaw still has a 2.93 ERA, 1.13 WHIP and 40:10 K:BB over 40 innings. He'll look to get back on track at home versus the Marlins over the weekend.
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Athletics' Gage Jump: Allows three runs in no-decision
Rotowire
Jump allowed three runs on five hits and a walk while striking out six over five-plus innings in a no-decision versus the Rockies on Friday.
Jump left two runners on base in the sixth inning, and Justin Sterner promptly served up a three-run home run to Cole Carrigg. It's just a no-decision for Jump, who has generally pitched well so far, though he's allowed seven runs over 10 innings in his two home starts (one in Sacramento, one in Las Vegas). He has a 3.09 ERA, 1.11 WHIP and 19:6 K:BB through 23.1 innings across four starts in total. The rookie southpaw is projected to make his next start in Sacramento against the Pirates. It'll likely come down to Jump or Jack Perkins for the last spot in the rotation once Aaron Civale (shoulder) returns from the injured list, though Perkins has primarily been a reliever in the majors this season.
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Athletics' Gage Jump: Shuts down Cubs for first MLB win
Rotowire
Jump (1-1) earned the win Tuesday against the Cubs, allowing one run on three hits and one walk while striking out five over seven innings.
Making just the second start of his MLB career, Jump bounced back from a lackluster debut by shutting down Chicago's lineup after an early shaky stretch. The left-hander allowed singles to Nico Hoerner and Pete Crow-Armstrong in the first inning, with one eventually coming around to score. In the second, he hit the leadoff man and surrendered a one-out single, but that would be the final hit he allowed all night. Jump retired the final 14 batters he faced en route to securing his first MLB victory. While he produced only five whiffs Tuesday, the 23-year-old is slated to face a Houston lineup that owned a 23.2 percent strikeout rate during May in his next start.
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Athletics' Gage Jump: Takes loss in MLB debut
Rotowire
Jump (0-1) allowed four runs on nine hits and one walk while striking out five batters over five innings in a loss to Seattle on Tuesday.
Jump was added to the 40-man and 26-man rosters ahead of Tuesday's contest and made his first appearance as a major leaguer. The left-hander retired the first three batters he faced but then had a rough second inning, giving up three runs on four hits and a walk. Jump gave up another run on five hits and a hit-by-pitch over the following two frames but did manage to finish the start with a 1-2-3 fifth inning. He displayed decent strikeout stuff overall, notching 13 whiffs and five punchouts. Jump could be lined up for additional starts while Aaron Civale (shoulder) remains on the injured list.
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Athletics' Gage Jump: Set to make MLB debut Tuesday
Rotowire
Jump will be called up from Triple-A Las Vegas to make his major-league debut Tuesday with a start against the Mariners, Martin Gallegos of MLB.com reports.
Reports had surfaced earlier Tuesday indicating that Jump was on his way to the big leagues, and now there's a specific date attached to his debut. Tuesday's previously scheduled starter, Luis Severino, will be pushed back as a result of Jump's addition to the rotation. Jump has collected a 4.50 ERA and 56:20 K:BB over 38 innings with Las Vegas this season and has spun 11 shutout frames with a 15:1 K:BB in his last two starts.
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Athletics' Gage Jump: Promoted to Double-A
Rotowire
The Athletics promoted Jump from High-A Lansing to Double-A Midland on Tuesday.
Jump underwent Tommy John surgery in college and was selected with the 73rd pick in the 2024 First-Year Player Draft. The six-foot southpaw gets good run on his mid-90s fastball and has two strong breaking balls in his slider and curveball. Jump logged a 2.32 ERA, 0.84 WHIP and 45:5 K:BB in 31 innings across six appearances for Lansing.
