Dallas Mavericks forward Keith Van Horn underwent surgery Tuesday to repair a broken bone in his right hand, the Associated Press is reporting, and remains out indefinitely.

He will miss the rest of the regular season and perhaps all of the playoffs.

Because of several other injured players, the Mavericks have asked the league for a roster exemption that would allow them to carry a 16th player.

"We think our chances are not good," coach Avery Johnson said.