Athletics' Gage Jump continues to dominate on the mound

Athletics pitcher Gage Jump. Lucas Peltier-Imagn Images

Athletics' Gage Jump continues to dominate on the mound

By Vanessa Serrao | Last updated Jun 25, 2026 4:58 PM ET

Gage Jump has been impressive on the mound for the Athletics since his call-up on May 26. Aside from his MLB debut where he got dinged with four runs on nine hits across five innings, picking up the loss against the Seattle Mariners, he has found his groove.

Despite the A's losing 2-1 against the San Francisco Giants on Wednesday, the rookie lowered his ERA to 2.04 with a dominant performance going five innings, giving up only three hits, no runs, one walk and striking out nine (career-high).

It was also his second consecutive scoreless outing, demonstrating his reliability. The rookie has logged a stellar 2.2% barrel rate that sits in the 98th percentile and a 34.5% chase rate that ranks in the 87th percentile.

In his last five starts, he has surrendered only four earned runs and no home runs, and he has 30 strikeouts for a 1.19 ERA and 0.79 WHIP. He has also been extremely remarkable on the road, boasting a 0.49 ERA.

I’d say this is a pretty good way to start your MLB career pic.twitter.com/vHplUyZsbg
— MLB Deadline News (@MLBDeadlineNews) June 25, 2026

Gage Jump's rookie season continues to propel success

The 23-year-old southpaw has continued to silence big-league hitters, by striking out prominent guys like Matt Chapman and Hunter Goodman.

He has also provided quite an impact as he has been able to avoid the long ball despite pitching in ballparks that are hitter-friendly. Across a minimum of 30 innings pitched across all left-handed pitchers since his debut, he ranks first with a 1.27 ERA, no home runs, a .230 SLG and a 2.14 FIP.

Gage Jump’s rankings among all LHP since his debut (Min. 30 IP):

1.27 ERA (1st)
25.7% K% (4th)
0 HR (1st)
.197 BAA (3rd)
.230 SLG (1st)
.231 wOBA (2nd)
0.96 WHIP (4th)
2.14 FIP (1st)

Not a bad start for the 23-year-old southpaw.#Athletics pic.twitter.com/tt6hbrTeBU
— Tobey Schulman (@tschulmanreport) June 25, 2026

His hard-hit rate also sits in the 85th percentile at 32.6%, illustrating his ability to limit hard contact, which has been a strong element of his success this season. He also has a commanding fastball, which was evident against the Giants, where it was topping out at 98 mph.

Overall, he's been a sensational success story for the Athletics, who are actively pushing to be contenders in the AL West this season.

Vanessa Serrao

Serrao is a freelance baseball writer who has covered all MLB teams, with particular expertise on the Toronto Blue Jays. She is a member of the Internet Baseball Writers Association of America.

More must-reads: