Boston Celtics swingman Jae Crowder sat out the team's off-day practice on Monday in New York and his availability for Tuesday's tilt with the New York Knicks is uncertain.

Crowder, who has appeared in all 49 of Boston's games, said he bruised his right shin, but told reporters that team trainer Ed Lacerte believes it might be a strain.

Crowder seemed hindered by the injury on Sunday in Orlando. He finished with just five points on 2-of-8 shooting and was minus-14 in plus/minus over 25:24 as Boston's five-game winning streak was stopped by the struggling Magic. Crowder played just four fourth-quarter minutes and subbed out with 2:37 remaining as Orlando started to pull away (he did return to play the final 41 seconds).

The Celtics are thin on experienced swingman depth, but Evan Turner could help fill minutes at that spot if Crowder can't go on Tuesday. Boston does have other options, including going small with three-guard lineups that feature Isaiah Thomas, Avery Bradley, and Marcus Smart, who is capable of guarding opposing 3s. If Crowder is out, it could also mean possible time for second-year swingman James Young.

Crowder, who signed a five-year, $35 million contract this summer, is averaging a career-best 14.3 points, 5 rebounds, 1.9 assists, and 1.8 steals over 32.1 minutes per game. Crowder's offensive improvements -- he's shooting career-bests at 44.8 percent overall and 36 percent beyond the 3-point arc -- is a big reason why Boston's starting unit has improved lately. The Celtics own an offensive rating of 105.3 when Crowder is on the court and that dips to 98 when he's on the bench, the same sort of dip experienced when fellow starters Thomas and Bradley are out of the game.