Atlanta Hawks forward Josh Smith went out of Game 2 against the Boston Celtics with a sprained knee and he won't be back for Game 3, according to Adrian Wojnarowski of Yahoo! Sports. The Hawks are already thin in the front court, missing the likes of center Al Horford due to injury.

Atlanta's Josh Smith will not play in Game 3 against Boston tonight, league source tells Y! "Knee is just too ... m.tmi.me/ptBZE

— Adrian Wojnarowski (@WojYahooNBA) May 4, 2012

The quote says that his knee is just too sore, but suggests that Smith will make an effort to play in Game 4 on Sunday. Smith appeared to have injured his knee after running into Kevin Garnett while battling for position down low.

For more on the Hawks-Celtics playoff series check out Peachtree Hoops and CelticsBlog. For more news and notes regarding the NBA Playoffs head over to SB Nation's NBA Basketball page.