|Date of birth||September 9, 1985|
|Place of birth||Vancouver, British Columbia, Canada|
|Height||6 ft 3 in (1.91 m)|
|Vic West FC|
|2001–2003||Timberline Secondary School|
|2008–2009||→ Eintracht Braunschweig II||14||(7)|
|2014–||CCBRT United FC|
|* Senior club appearances and goals counted for the domestic league only and correct as of September 16, 2014.
‡ National team caps and goals correct as of July 10, 2013
On January 18, 2007 O'Neill was drafted by Colorado Rapids in the third round (36th overall) of the 2007 MLS Supplemental Draft. His rights were traded to Toronto FC on April 19, 2007. However, he never signed with Toronto, opting to try his luck abroad.
O'Neill signed with German club SV Wilhelmshaven who played in the Regionalliga Nord in 2007 through 2008, before moving to Eintracht Braunschweig. He struggled for playing time with Braunschweig, spending most his time with their second team. O'Neill moved back to SV Wilhelmshaven in 2009.
The Victoria Highlanders announced the signing of Riley O'Neill as one of their over-age players for the 2013 May–July summer USL PDL season. He joined 2014 to new founded Vancouver Metro Soccer League club CCBRT United FC, who played with former pro Taj Sangara.
- VMSL Imperial Cup Quarterfinals
- Conor Casey (July 25, 1981). "Conor Casey". MLSsoccer.com. Retrieved May 23, 2013.
- "Highlanders Player Announcement - Riley O'Neill". Islandsportsnews.net. April 17, 2013. Retrieved May 23, 2013.
- Rich got richer and the poor got poorer in VMSL Premier Division