Cheechoo, who won the Maurice Richard Trophy with a franchise-record 56 goals, has missed two games with a left leg injury incurred last week when Colorado's Karlis Skrastins fell on top of him during a goal-mouth scramble.
The move is retroactive to Nov. 16, and Cheechoo must sit out seven days before returning.
Cheechoo has scored seven goals in 20 games this season, including just two in his last 11 outings - perhaps because his pairing with MVP Joe Thornton has been broken up several times this season. Although the Sharks were third in the NHL with 30 points entering Wednesday night's games, coach Ron Wilson repeatedly has shuffled his lines to try new combinations.
Pavelski, a fast-rising former seventh-round draft pick, helped lead Wisconsin to the NCAA title last season, then nearly made San Jose's roster in training camp.
The 22-year-old centre has been outstanding in his first professional season with the AHL's Worcester Sharks, leading all rookies with 26 points, including eight goals.