(Reuters) - New York Knicks back-up forward/center Rasheed Wallace will have surgery this week to repair a broken left foot and will probably miss the rest of the regular season, the team said on Wednesday.

The 38-year-old Wallace, who came out of a two-year retirement to join the Knicks last October, had been sidelined since mid-December with a foot injury.

Wallace played well for the Knicks (33-20), who lead the National Basketball Association's Atlantic Division despite recent struggles, averaging 7.2 points and 4.2 rebounds in 14.6 minutes a game.

New York moved to shore up their frontline by signing free-agent forward Kenyon Martin to a 10-day contract on Saturday.

(Reporting by Larry Fine; Editing by Frank Pingue)