Mason Barnett is a Common 57 OVR Relief Pitcher card for the Athletics, 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, Mason Barnett works with a 4-pitch arsenal led by a 95 mph 4-Seam Fastball and a 84 mph Sweeper. His pitching ratings include 79 Velocity, 53 Control, and 57 Break. The profile favors a balanced mix of command and movement.

On the Diamond Dynasty market, Mason Barnett currently buys for about 23 stubs, with sell orders near 0 stubs. Over the past 7 days the buy price has climbed roughly 15%. Its quick-sell value of 2 stubs sits at or above the sell price, making it quick-sell viable. DiamondOps flags the card as currently overpriced.

OpScore is DiamondOps' composite rating of a card's in-game performance value. Mason Barnett earns an OpScore of 43.8 on Legend difficulty, ranking #2532 among all cards and #590 among Relief Pitchers.