Why Jakob Marsee's early slump will end soon

Coming off of what was a great two-month debut with the Miami Marlins in 2025, Jakob Marsee entered 2026 with lofty expectations. While his defense and baserunning have remained strong, the bat has been lacking to start the new season. Entering Saturday, Marsee's slash line is .148/.254/.204 with a .224 wOBA and 37 wRC+. It's a stark difference from his 133 wRC+ in 55 major league games last year. 

On the surface, these numbers are poor, and his expected stats only partially paint a better picture. However, a change to Marsee's stance in the batter's box has seemingly contributed to massive increases in important metrics, which will eventually lead to positive outcomes.

First off, Marsee has gotten unlucky. His batting average on balls in play has plummeted from .357 as a rookie to .205 as a sophomore. Regression was expected, but this is an overcorrection that has him way underperforming league averages and his own minor league career norms.

Marsee's hard-hit rate and average exit velocity are much higher than the prior season. Those alone would point to future success, but I can dig even deeper to prove my case. 

Marsee's approach is potentially his best tool, and that has for the most part been the same as last year. In fact, his in-zone-contact rate has increased to 95%, up 8% from last season and 7% better than the MLB average. He's putting balls in the air more frequently, with his pulled-air rate rising up to 31%, which is nearly doubled the rest of the league. He is chasing outside the zone a tad more, but still ranks in the 83rd percentile in that department, according to Baseball Savant.

The home runs are coming for Marsee if he stays consistent with what he's already doing in these areas.

Marsee's new tendency to pull balls is no small-sample coincidence. Consider that last year, he stood 30.4 inches deep in the box, whereas this year, his depth is only 27.2 inches. That positioning has caused his "intercept point" to move 7.9 inches in front of home plate, compared to -0.3 inches previously (slightly behind the front of the plate). For context, league average is 2.9 inches in front.

Monitoring Marsee's stance changes will be important to see how he adjusts (or doesn't adjust) to his early struggles. From my view, he shouldn't change a thing. These are all indicators of a strong hitting profile and the hits will soon follow.