Brian, played for Bud Dombroski's Jr Flyers Midget Team during the 2005-06 season and 2006-07 season before being drafted into the USHL. In the USHL, Brian set the scoring record for the Chicago Steel and committed to play for Yale Bulldogs.
2005-06                    Philadelphia Jr. Flyers 18U AAA "A"   AYHL 18U
2006-07                    Philadelphia Jr. Flyers 18U AAA "C"   AYHL 18U
2007-08                    Chicago Steel   USHL
2008-12                    Yale Univ. "C" (2011-12)   NCAA
2012-16                    Manchester Monarchs "A" (2014-15)   AHL
2015-16                    New Jersey Devils   NHL
2018  Olympics    Pyeongchang,  Korea   USA TEAM
2016-22                    Jokerit. "A" (2020-21)   KHL 
2022  Olympics    Beijing, China   USA TEAM

USA Hockey announced its roster late Thursday afternoon and O’Neill was the only returning player from 2018 on it.
O’Neill, 33, is playing in his sixth season for Finland’s Jokerit professional team in Russia’s Kontinental Hockey League.
He had a brief, 22-game tryout with the NHL’s New Jersey Devils back in the 2015-16 season but when the year was over, he opted to play in Europe and has stayed there since.