Defenseman Chris Felix, who had been called up from Baltimore to replace injured Mikhail Tatarinov, was injured yesterday in the Washington Capitals' 5-2 loss to the Toronto Maple Leafs at Capital Centre.

Felix broke his right ankle with about five minutes left in the first period. He had X-rays at Bowie Medical Center and team physician Richard Grossman applied a cast that Felix will have to wear four to six weeks.

"The whole leg . . . " Felix said, while making the motion of wringing out a wet cloth. "It was like a chicken bone."

As for Tatarinov, he missed his second straight game with a knee injury that Coach Terry Murray described as a strained ligament. Tatarinov skated briefly before the game, as he did in St. Louis on Thursday, but the pain was too great.

"I'm hoping it will be okay after the holiday," said Murray, whose team will be off until it meets Pittsburgh here on Wednesday. May Is Benched

Alan May was scratched from the lineup for the first time this season. The Capitals' enforcer has missed time because of injury, most recently with a sore shoulder, but this was his first benching.

"I need him to get back to the type of play that he established last year," Murray said. "It's just not there. The shoulder's been bothering him. I think it's affected his game. Maybe after a couple days off, he will be okay." Rob Murray Returns

Rob Murray, who went to Washington's minor league team in Baltimore on a two-week conditioning assignment, returned to the Capitals, but he was scratched from the lineup. The other scratch was Tim Bergland. . . .

This was Dale Hunter's 800th NHL game. . . . The Capitals are scoreless in their last 18 power play chances. . . . John Druce is scoreless in nine straight games. . . . Mike Lalor's goal in St. Louis was his first in 139 games. The prior goal came on Feb. 11, 1989, when he scored for the Blues against the Islanders.

Washington's Don Beaupre came into the game leading the NHL in goals-against average (2.23), but his won-lost record is 5-8-0 after the loss to the Maple Leafs. . . .

Toronto's Dave Reid has as many shorthanded goals (16) as 17 of the other 20 teams in the league.