Frederic scored a goal on two shots and added three hits in Wednesday's 6-5 overtime win over the Oilers.
Frederic scored two goals and added an assist in Sunday's 5-3 win over the Red Wings.
Frederic scored a goal and added an assist in Thursday's 5-2 win over the Islanders.
Frederic scored his team's first goal of the new campaign in a 3-1 home victory against the Blackhawks on Wednesday.
Frederic inked a two-year, $4.6 million contract with Boston on Tuesday, Elliotte Friedman of Sportsnet reports.
Frederic had two assists with three shots on goal and two blocked shots in Sunday's 4-3 shootout win over St. Louis.
Frederic logged a shorthanded assist, two hits, two blocked shots and a plus-2 rating in Wednesday's 5-2 win over the Maple Leafs.
Frederic (lower body) logged 14:21 of ice time in Boston's 4-1 loss to Carolina on Sunday.
Frederic (lower body) is in Sunday's lineup against Carolina, Jack Edwards of NESN reports.
Frederic (lower body) will take warmups before deciding if he's able to suit up Sunday against Carolina.