In 202 career NHL games, all with the Sharks, Tierney has registered 24 goals, 40 assists, two shorthanded goals, and five game-winning goals. During San Jose's run to the 2016 Stanley Cup Final, Tierney played in all 24 games and tallied five goals, four assists, and a 33.3% shooting percentage (ranked 1st on the team).
During his 31 career games with the Sharks AHL affiliates in Worcester and San Jose, Tierney scored 32 points (9 goals, 23 assists), a plus-11 rating, and 1.03 points per game.
Prior to joining the Sharks organization, Tierney spent four seasons with the London Knights of the Ontario Hockey League (2010-2014), including helping the Knights to consecutive OHL Championships in 2011-12 and 2012-13. In 2013-14, his final season in the OHL, Tierney led the team in goals (40) and ranked 2nd in points (49) as the Knights' captain. That season he also paced London in playoff scoring (6-11=17) and was voted the OHL Western Conference's Smartest Player in the OHL Coaches Poll.
The six-foot-one, 195-pound native of Keswick, Ontario was originally selected by San Jose in the 2nd round (55th overall) of the 2012 NHL Draft.