Rask/By S. Bradley

After they went out and lost their second in a row, this time on the road to the New York Rangers, 4-3, the Bruins announced this afternoon that they wouldn’t have an update on goaltender Tuukka Rask’s health situation until Monday.

Via Twitter, the Bruins said that a full evaluation of Rask’s injury would be completed by then.

Rask suffered what was apparently a left-leg injury Saturday in Boston’s 3-2 loss to the New York Islanders at the TD Garden. He was helped from the ice by two teammates and wasn’t putting any weight on his left leg. He was seen leaving the TD Garden on crutches.

Without Rask, Tim Thomas will have to hold down the fort. He got that task off to a troubling start today in the loss to the Rangers. Thomas allowed four goals on just 17 shots faced. The biggest goal of the day was the game-winner by Derek Stepan, who beat Thomas from the top of the left circle with a wrist shot and very little traffic in front of the Boston goal. If the Bruins are going to survive the Rask absence, Thomas has to be better.

Thomas’ subpar performance and Boston’s inability to prevent the Rangers from taking a 2-0 lead just 6:15 into the game ruined Jordan Caron’s first NHL two-point game (1 goal, 1 assist) and an overall solid four-line showing by the Bruins’ forwards.

Thomas hasn’t made more than three starts in a row yet this season. He last started four in a row last January & February. Even if the Bruins get a best-case diagnosis on Rask, you have to figure last year’s Vezina Trophy winner will be asked to exceed that workload in the weeks ahead. And the Bruins have to hope that the 37-year-old can begin to channel the goaltender he was in starting 25 straight games last spring.