Baseball, surnames starting with O: showing 49–96.

• Darren O'DayLos Angeles Angels, RP
• Darren OliverHouston Astros, RP
• DODavid Olmedo-BarreraTampa Bay Rays, LF
• David OrtizBoston Red Sox, DH
• DODemi OrimoloyeToronto Blue Jays, CF
• DODeniel OrtizSt. Louis Cardinals, 3B
• Dennis OrtegaSt. Louis Cardinals, C
• DODevin OrtizChicago Cubs, 3B
• DODeyni Olivero

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.