2012 Slam Dunk Contest entrant Jeremy Evans
Here's when the NBA Slam Dunk Contest 2012 is and what TV channel you can watch it on. Reuters

Jeremy Evans will replace the New York Knicks' Iman Shumpert in the Sprite Slam Dunk Contest during All-Star weekend.

Shumpert's absence means his Knicks teammate Jeremy Lin, who was to assist him, will no longer be featured.

Utah Jazz forward Evans was called in for this weekend's contest after Shumpert was ruled out with a left knee injury. Despite playing through discomfort in the Knicks' win over the Dallas Mavericks on Sunday, Shumpert was forced to sit out his team's defeat to the New Jersey Nets the following night.

Knicks coach Mike D'Antoni addressed Shumpert's injury before Monday's game by saying, Rest will take care of something like that, according to ESPN. But, while initially being listed as day-to-day, he has now been ruled out until after the All-Star break.

The other remaining participants in the dunk contest are Houston's Chase Budinger, Indiana's Paul George and Minnesota's Derrick Williams.

The format for the contest has been changed this year with there now scheduled to be just one round of three dunks each. The winner will be decided by fan voting. The 2011 contest was won by the Los Angeles Clippers' Blake Griffin.

Knicks star Lin will still be performing during the All-Star weekend as a part of the Rising Stars Challenge.