Baseball, surnames starting with A: showing 241–288.

• Jayson AquinoBaltimore Orioles, SP
• JAJeff ArnoldSan Francisco Giants, C
• Jeff Sean AmesMinnesota Twins, RP
• JAJeisel AcostaWashington Nationals, C
• Jeremy AccardoSan Francisco Giants, RP
• Jeremy AffeldtKansas City Royals, RP
• Jesus AguilarCleveland Indians, 1B
• JAJesus AlastrePhiladelphia Phillies, CF
• JA

Professional competitions only. Pick a competition to see everyone who has played in it, with games and seasons, or a club for its full list. Club pages also show the current squad and every former player we hold.