NEW YORK (Reuters) - The New York Rangers' late-season push to clinch a playoff spot was dealt a blow as forward Ryan Callahan is out indefinitely with a broken ankle, the team said on Tuesday.

Callahan, the Rangers' second-leading scorer, fractured his right ankle while blocking a Zdeno Chara shot during a 5-3 win over the Boston Bruins on Monday.

The Rangers have a one-point lead over the Buffalo Sabres, who hold the last playoff spot in the NHL's Eastern Conference, and a four-point edge over ninth-place Carolina with two regular-season games remaining.

Callahan had set career highs for goals (23), assists (25) and points (48) while also leading the Rangers in power-play and game-winning goals despite missing 19 games with a broken hand in December and January.

(Reporting by Gene Cherry in Salvo, North Carolina; Editing by Frank Pingue)