Mark Leiter Jr. is a Bronze 68 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, Mark Leiter Jr. works with a 5-pitch arsenal led by a 94 mph Sinker and a 91 mph Cutter. His pitching ratings include 90 Velocity, 64 Control, and 99 Break. The profile favors a movement-heavy arsenal built to miss bats.

DiamondOps grades each pitch in Mark Leiter Jr.'s arsenal: Slider (S), Sinker (S), Cutter (S), Splitter (A), and 12-6 Curve (B). 3 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 Cutter off the Slider, so the two share a release look. Velocity works against the card here — its 90 mph Sinker 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, Mark Leiter Jr. currently buys for about 27 stubs, with sell orders near 0 stubs. Over the past 7 days the price has held roughly steady. Its quick-sell value of 25 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. Mark Leiter Jr. earns an OpScore of 63.4 on Legend difficulty, ranking #1620 among all cards and #206 among Relief Pitchers.