Rask stopped 27 of 30 shots in Monday's 4-2 loss to the Lightning in Game 2.
Rask (lower body) "doesn't look like he'll be able to go" for Tuesday's game against Detroit, according to head coach Bruce Cassidy.
Rask is suffering from a "very minor" injury ahead of Saturday's game against the Canadiens, Joe Haggerty of NBC Sports Boston reports.
Rask made 22 saves in Thursday's 8-4 win over the Penguins.
Rask will guard the cage in Thursday's home game against the Penguins, NESN's Jack Edwards reports.
Rask will be the home starter in Tuesday's game against the Hurricanes, Joe Haggerty of NBC Sports Boston reports.
Rask will tend twine Saturday evening against host Toronto, Joe Haggerty of NBC Sports Boston reports.
Rask saved 28 of 29 shots during Monday's 2-1 overtime win against Calgary.
Rask is slated to be between the pipes against the Flames on Monday, Aaron Vickers of NHL.com reports.
Rask was pulled Saturday against Vancouver after allowing four goals on eight shots.