Mason Montgomery

Mason Montgomery is a Gold 83 OVR Closer card for the Pirates, part of the Live set in MLB The Show's Diamond Dynasty. He throws left-handed. The card was added to Diamond Dynasty in April 2026.

On the mound, Mason Montgomery works with a 3-pitch arsenal led by a 99 mph 4-Seam Fastball and a 97 mph 2-Seam Fastball. His pitching ratings include 99 Velocity, 61 Control, and 96 Break. The profile favors a movement-heavy arsenal built to miss bats.

DiamondOps grades each pitch in Mason Montgomery's arsenal: Slider (S), 4-Seam Fastball (S), and 2-Seam Fastball (S). 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 4-Seam Fastball off the 2-Seam Fastball, so the two share a release look. Its 99 mph 2-Seam Fastball adds a velocity bonus on top. 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, Mason Montgomery currently buys for about 1,225 stubs, with sell orders near 0 stubs. Over the past 7 days the price has held roughly steady. Its quick-sell value of 1,200 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. Mason Montgomery earns an OpScore of 72.2 on Legend difficulty, ranking #1635 among all cards and #84 among Closers.

Live Series cards like Mason Montgomery's are the ones Diamond Radar scores: it reads a player's real MLB production and predicts what the next roster update will do to the card — the predicted rating, the tier jump, and how likely the upgrade is. Ratings only move at a roster update, and not every Live Series card is scored in a given window. Model v11: of the 358 cards it scored 70 or above in its 3 graded updates, 69% were upgraded, against 17% by chance: 4.1× better.