Nathan Horton/By S. Bradley

Nathan Horton/By S. Bradley

The Bruins lost a game to Pittsburgh 3-2 Saturday, and lost Nathan Horton to an avoidable injury in the first period at TD Garden.

The forward was injured during a fight with Penguins winger Jarome Iginla and did not return to the game.

Coach Claude Julien offered no update on Horton, who seemed to be favoring his left wrist or hand as he skated to the dressing room. Horton was holding onto Iginla’s sweater with his left hand as he fell, and then he reached for his left hand with his right as soon as the linesman stepped.

It was Horton’s second fighting major of the season. Considering his importance to the Bruins and his recent history of head injuries, Horton might’ve been wise to avoid a fight that didn’t seem to be inspired by anything — or at least anything Iginla was willing to reveal.

“Horton, he’s a tough competitor and it’s just kind of one of those things,” said Iginla, who scored the go-ahead goal in the third period for Pittsburgh. “We were all kind of our there and battling and jawing and it wasn’t much … it was over pretty quick. I see he didn’t come back. I don’t know if his shoulder [got hurt] when he fell or what, we fell down pretty quick. …

“It wasn’t a long personal thing or anything, it kind of just happened.”

The Bruins had already scratched Milan Lucic, so they played most of the game without two of their bigger forwards.