NEW YORK — A day after Chris Wilcox was ruled out for at least three weeks with a sprained ulnar collateral ligament in his right thumb, the Celtics signed former Miami Heat draft pick Jarvis Varnado from the NBA Development League to improve their frontcourt depth.

Varnado, 24, who played at Mississippi State, was averaging 14 points, 10 rebounds, and a league-leading 3.9 blocks for Sioux Falls.