Adam Schefter provides an update on Antonio Brown, who suffered a partially torn calf muscle against the Patriots on Sunday. Brown is unlikely to play during the remainder of the regular season. (1:37)

PITTSBURGH -- Antonio Brown, the Pittsburgh Steelers All-Pro wide receiver, suffered a partially torn calf muscle in Sunday's 27-24 loss to the New England Patriots, a source told ESPN's Adam Schefter.

Brown is unlikely to play next week but is expected back for the postseason, the source said.

Brown left Sunday's game early in the second quarter with a left calf injury and did not return. Team officials helped Brown off the field and to a blue tent on the sideline. He was then taken to the hospital for evaluation.

Brown attempted to catch a pass in the end zone when a Patriots defensive back appeared to roll over his left leg.

Brown is considered one of the Steelers' toughest players. He hasn't missed a regular season game because of injury since 2012.

Earlier in the game, Brown became the first receiver in NFL history with five consecutive seasons with triple-digit receptions, breaking his tie with Marvin Harrison at four.

Brown entered the Week 15 matchup with the Patriots with 99 catches.