Sean "O.D." O'Donnell (born October 13, 1971) is a Canadian professional ice hockey defenceman who currently plays for the Philadelphia Flyers of the National Hockey League (NHL). Drafted 123rd overall by the Buffalo Sabres in the 1991 NHL Entry Draft, O'Donnell has also played for the Anaheim Ducks, Minnesota Wild, New Jersey Devils, Boston Bruins, Phoenix Coyotes, and Los Angeles Kings. He won the Stanley Cup as a member of the Ducks in 2007.
O'Donnell grew up in the Ottawa area playing minor hockey with several teams before playing his Midget season with the CJHL's Kanata Valley Lasers in 1987-88. He was a 4th round choice (59th overall) of the Sudbury Wolves in the 1988 OHL Priority Selection.
O'Donnell played major junior in the Ontario Hockey League (OHL) with the Sudbury Wolves for the three seasons. Following his third and final OHL season, he was drafted by the Buffalo Sabres in the 6th round of the 1991 NHL Entry Draft.