Signed all the way back in May 2017, Martinez is older than your typical ascending prospect, at 25 years old. Despite his advanced age, however, he continues to rise within the organization, and even on the national scale. After a very strong 2024 season in Double-A Biloxi (especially in the second half), Martinez re-signed with the Brewers on a minor-league deal. While he is currently out with an injury, he was off to a great start in Triple-A Nashville.

Standing 6-foot-6 and weighing 250 pounds, Martinez is an impressive athlete. One sign of that athleticism can be seen in his defense at first base. He has the ability to do the splits, and he is happy to show it off. A strong defender over there in general, Martinez should not have any issues holding down the cold corner at the major-league level. Another sign of his athleticism lies in the fact that, while first base is his future position and the spot at which he spends the vast majority of his time, he has also spent some limited time as a center fielder. Martinez even went 20-for-25 in stolen base attempts for Biloxi in 2024. Never mind baseball players; not many human beings his size can move like he can.

While the defense and the athleticism are impressive, the driving factor behind Martinez’s late ascent as a prospect is his offense. His results have been impressive, as evidenced by his 145 wRC+ in Double A, but his process-based numbers have really drawn the attention of analysts. Martinez hits the ball extremely hard, with a 90th percentile exit velocity of 111.5 MPH. For reference, Oneil Cruz leads MLB in that category at 114.7 MPH. Aaron Judge is at just 111.1. Martinez hits the ball as hard as anyone in baseball. 

Most players who hit the ball as hard as he does have issues with whiffs—especially players who have a swing as violent as Martinez’s. Martinez whiffs at a 20.3% rate, though, which would be in the 75th percentile at the big-league level. He also doesn’t chase much. One nitpick would be that he would benefit from being able to get the ball in the air more often, as the home run numbers don’t necessarily line up with the hard-hit metrics. Whether the home run power is there consistently or not, there is a ton to like when it comes to Martinez’s bat.