Gage Jump Has Wasted No Time Proving His Worth

Gage Jump wasted no time making it to the big leagues. After being drafted in the second round of the 2024 MLB draft, Jump was recalled earlier in the season by the Athletics with just one full professional season under his belt.

Jump, Just Baseball’s No. 30 overall prospect, has not only lived up to expectations but exceeded them, providing a much-needed boost to an Athletics rotation that was desperate for starting pitching.

The 23-year-old southpaw has emerged as the Athletics’ top starter since making his debut, and he looks like a crucial piece for the team’s present and future.

Stats were taken prior to play on June 29.

Gage Jump’s Fastball

Jump is off to a fantastic start to his MLB career. The lefty starter has posted a 2.04 ERA and 2.14 FIP with 35 strikeouts through his first six MLB starts. Take one look at Jump’s Baseball Savant page, and it’s clear that he’s doing a lot of things well.

The pitch behind all of that success for Jump is his four-seam fastball. He throws it 48% of the time as his primary offering, and the pitch sits 96.6 mph with very strong vertical ride.

The pitch is limiting opponents to a .222 batting average, a 32.5% hard-hit rate, and has already produced a +6 run value, per Baseball Savant.

Jump has done a terrific job of pitching to weak contact to start his MLB career. His barrel rate of just 2.2% is in the top two percent of MLB pitchers. He’s also in the 85th percentile in hard-hit rate (32.6%), and he’s doing that while throwing a lot of strikes. That’s a combination for success.

Jump has shown why evaluators have long believed in his fastball. Sitting in the mid-to-upper 90s with riding life (16.8 IVB), the pitch plays above its velocity because of its shape and release characteristics.

His slider-sweeper combination plays off the elevated fastball because they share similar release points before separating late, forcing hitters to commit early. That’s led to plenty of uncomfortable at-bats for opposing hitters through his first six starts.

Jump’s Improvements

The biggest reason I believe Jump’s success is legitimate rather than the product of a hot start is the improvement he’s made to his pitch arsenal. Paired with his delivery, it’s easy to see why he is having so much success.

As mentioned earlier, his fastball plays because of its shape, not just its velocity. Hitters are consistently swinging underneath it because of the induced vertical break.

When you pair that with a slider that comes out of the same window before diving away, hitters have to make a decision much earlier than they’d like. Jump has also added a changeup to his arsenal that hitters need to be aware of. Thrown exclusively to righties, he has not surrendered a hit against his changeup this season.

In terms of his delivery, nothing screams max effort. He repeats his release well, stays online toward the plate, and maintains his velocity into the middle innings. That matters because repeatability usually leads to consistent command.

Young pitchers who are succeeding on pure stuff often lose the zone. Jump hasn’t looked like that.

A’s Pitching Development

Jump’s success is a big deal for the A’s. First and foremost, it shows that they can develop a legitimate starting pitcher. To this point, the A’s have shown an ability to develop position player prospects exceptionally well, but the same can’t necessarily be said for pitchers.

Jump is evidence that the Athletics’ pitching development is improving. They did an excellent job identifying his fastball characteristics and pairing them with breaking balls that tunnel well. Jump isn’t succeeding because they reinvented him. They’re maximizing traits he already had coming out of LSU.

This is something they’ll look to do with more pitchers in their system. Jump’s success could play a role in the A’s drafting for pitching. If the A’s think they can repeat the same development process with pitchers that have similar characteristics as Jump, they could prioritize them on draft day.

A’s Present and Future

The A’s have built a legitimate offensive core. With hitters like Shea Langeliers, Nick Kurtz, Jacob Wilson, and more, the A’s have a lineup that has devastating potential as they gear up toward their move to Las Vegas.

As we saw from their brief time playing in the city of Las Vegas a couple weeks ago, their new home could be a hitter’s paradise. It also means pitching will become even more important.

They’re going to need to develop pitching if they want to have a complete team heading into the move in 2028. For the A’s, the hope is that Jump is the first of many quality young pitchers to burst onto the scene.

The A’s shouldn’t just wait for 2028 to try and compete, though. The AL is as weak as it’s ever been, and they’re only two games out of the division lead and a game and a half back of a playoff spot.

When the lineup is doing its job, runs come in bunches. The problem for the A’s the last couple of years has been the pitching. It’s hard to win a division when you’re trying to win with slugfests.

If Jump cements himself as the staff ace, however, it could change things for them. If Jump gives them a scheduled advantage on the days he’s pitching, it could make all the difference moving forward for this young and exciting ball club.