Brian Strait's season could be over after he suffered what was diagnosed as a broken left ankle Monday.

He hobbled out of Nassau Coliseum on crutches after suffering the first big injury to an Islander this season. Strait caught a rut in the ice in the second period and stumbled, feet first, into the side boards.

"He's going to be out a while," Jack Capuano said of Strait, who has been the steadiest Islanders defenseman this season with four assists and a plus-3 rating.

Strait was claimed off waivers from the Penguins on Jan. 18, then showed enough to be given a three-year, $2.325-million extension Jan. 31.

The Islanders activated Radek Martinek (groin) off injured reserve and will bring Matt Carkner (lower body) along on their three-game road trip. Defenseman Thomas Hickey, a healthy scratch the last three games, is expected to play Tuesday night in Ottawa.