RJ Petit is a Common 57 OVR Relief Pitcher card for the Free Agents, part of the Live set in MLB The Show's Diamond Dynasty. He throws right-handed. The card was added to Diamond Dynasty in April 2026.

On the mound, RJ Petit works with a 4-pitch arsenal led by a 95 mph 4-Seam Fastball and a 93 mph 2-Seam Fastball. His pitching ratings include 80 Velocity, 55 Control, and 56 Break. The profile favors a balanced mix of command and movement.

DiamondOps grades each pitch in RJ Petit's arsenal: Slider (S), 4-Seam Fastball (S), 2-Seam Fastball (S), and Sweeper (S). 4 of them grade S-tier, which is what separates a genuine out-pitch mix from a deep-but-flat arsenal. Its strongest tunnel pairing is the 4-Seam Fastball off the 2-Seam Fastball, so the two share a release look. Velocity works against the card here — its 80 mph 4-Seam Fastball is slow enough to cost it in the arsenal score. Arsenal grades are the same at every difficulty — unlike a hitter's OpScore, a pitch mix does not re-weight as you climb.

On the Diamond Dynasty market, RJ Petit currently buys for about 7 stubs, with sell orders near 0 stubs. Over the past 7 days the price has held roughly steady. Its quick-sell value of 5 stubs sits at or above the sell price, making it quick-sell viable. DiamondOps suggests waiting for a better entry point.

OpScore is DiamondOps' composite rating of a card's in-game performance value. RJ Petit earns an OpScore of 54.3 on Legend difficulty, ranking #2355 among all cards and #432 among Relief Pitchers.