The Finnish goalie was injured during HC Plzen's game against HC Slavia Praha Tuesday, leaving after the first period and not returning. It's not immediately clear how serious the injury is, or whether he will miss a significant amount of time.
It's not his first groin injury of late: he also hurt the area this past season, missing 19 regular season games and five playoff games for the Bruins. The team opted to sign Marty Turco as a backup to Tim Thomas while Rask was sidelined with the injury.
Rask is expected to be the Bruin's No. 1 goalie this season with Thomas taking a self-imposed hiatus from the sport and Anton Khudobin the other goalie on the roster. The 25-year-old is 47-35-11 in 102 career NHL games, all with the Bruins, with a 2.20 GAA and .926 save percentage.