O
| Player | Nat. | No. | Position | Years | From | ||
|---|---|---|---|---|---|---|---|
| O'Bryant, PatrickPatrick O'Bryant | 26 | C | 2008 | 2009 | Bradley | ||
| O'Connell, DermottDermott O'Connell | 7 | G | 1948 | 1950 | Holy Cross | ||
| O'Neal, JermaineJermaine O'Neal | 7 | C | 2010 | 2012 | Eau Claire | ||
| O'Neal, ShaquilleShaquille O'Neal | 36 | C | 2010 | 2011 | Louisiana State | ||
| Oliver, JimmyJimmy Oliver | 27 | G-F | 1993 | 1994 | Purdue | ||
| Olowokandi, MichaelMichael Olowokandi | 41 | C | 2005 | 2007 | Pacific | ||
| Olsen, EnochEnoch Olsen | 25 | F-C | 1968 | 1969 | Louisville | ||
| Overton, DougDoug Overton | 9 | 20 | PG | 1999 | 2001 | La Salle | |
Read more about this topic: Boston Celtics All-time Roster