The Boston Celtics will sign Jarvis Varnado of the NBA D-League's Sioux Falls on Monday, according to a league source.

The 6-foot-9 Varnado has averaged 14 points, 8.9 rebounds and 4.4 blocks with Sioux Falls.

Doc Rivers admitted on Sunday that the Celtics would look to sign a big man given the loss of Chris Wilcox, who could miss one month with a sprained ligament in his left thumb.