BOSTON — The Los Angeles Angels’ pennant hopes were dealt a serious blow Wednesday night when Garrett Richards, their best pitcher this season, suffered a patellar injury to his left knee against Boston in Fenway Park.

Although Angels manager Mike Scioscia said only that it was a “serious” injury, players in the clubhouse were assuming that Richards will be out for the season.

Richards was taken to a hospital and he will fly to Southern California on Thursday to be more fully evaluated, the Angels said.

Mike Trout, Richards’ housemate and one of his closest friends on the team, said Richards “was in tears” in the trainer’s’room.

With runners on first and second and one out in the second inning, Brock Holt hit a grounder to first baseman Albert Pujols, who spun and fired to second for a force out.

Richards sprinted from the mound toward first to receive a relay from shortstop Erick Aybar, but as he approached the bag, he caught his right cleat in the dirt, and his knee buckled.

Note

• Former major-league pitcher Curt Schilling said he’s been treated for mouth cancer and blames the disease on using chewing tobacco for about 30 years. The former Red Sox right-hander announced in February that he had cancer but had not disclosed what kind. He has said he is in remission after seven weeks of radiation and chemotherapy and has lost 75 pounds. “I’m not going to sit up here from the pedestal and preach about chewing,” he said. “It was an addictive habit. I can think about so many times in my life when it was so relaxing to just sit back and have a dip and do whatever. And I lost my sense of smell, my taste buds for the most part. I had gum issues, they bled, all this other stuff. None of it was enough to ever make me quit.”