Biz Mackey is a Diamond 90 OVR Catcher card for the Free Agents, part of the The Negro Leagues set in MLB The Show's Diamond Dynasty. He is a switch hitter. He is also eligible at First Baseman, Second Baseman, Third Baseman, Shortstop, Left Fielder, Center Fielder, and Right Fielder. The card was added to Diamond Dynasty in April 2026.

At the plate, Biz Mackey's standout tools are 91 Arm Strength, 90 Contact, and 90 Fielding. His profile leans toward contact hitting. Notable quirks include Dead Red, Unfazed, and Situational Hitter from a total of 6 quirks.

Biz Mackey is eligible at 9 positions, and DiamondOps scores each one separately: Catcher (102.3), Third Baseman (87.8), Second Baseman (87.2), Shortstop (87.0), First Baseman (86.8), Right Fielder (86.8), Designated Hitter (84.8), Left Fielder (83.9), and Center Fielder (82.9) on All-Star. The card is strongest at its listed position, Catcher, at every difficulty. At Catcher the card scores 102.3 on All-Star, 104.7 on Hall of Fame, and 104.7 on Legend — it keeps 102% of its All-Star value at the top difficulty, which is unusually durable. Among Catchers the card ranks #10 on Hall of Fame and #15 on All-Star.

On the Diamond Dynasty market, Biz Mackey currently buys for about 22,789 stubs, with sell orders near 18,328 stubs. Over the past 7 days the buy price has fallen roughly 42%. Flipping at current buy and sell prices nets roughly 2,180 stubs, about a 12% return. DiamondOps currently rates the card a buy at this price.

OpScore is DiamondOps' composite rating of a card's in-game performance value. Biz Mackey earns an OpScore of 104.7 on Legend difficulty, ranking #49 among all cards and #12 among Catchers.