Rask underwent successful surgery to repair his injured right groin Tuesday and is expected to be ready for the start of the 2017-18 NHL season.
Rask allowed three goals on 29 shots in a 3-2 overtime defeat during Game 6 of the first round against the Senators. Ottawa won the series, 4-2.
Rask will be in the crease for Sunday's Game 6 against Ottawa, Joe Haggerty of CSN NE reports.
Rask denied 41 of 43 shots from the Senators on Friday, en route to a double-overtime win for Game 5.
Rask will start between the pipes in Friday's Game 5 against the Senators, CSN New England's Joe Haggerty reports.
Rask saved 26 of 27 shots during Wednesday's Game 4 loss to Ottawa.
Rask is slated to start Wednesday's home game against the Senators, CSN's Joe Haggerty reports.
Rask saved just 28 of 32 shots during Monday's Game 3 loss to Ottawa.
Rask is slated to start Monday's playoff game at home against the Senators, the Boston Herald reports.
Rask made 25 saves Saturday in a 4-3 overtime loss to the Senators.