By WILL GRAVES, AP Sports Writer

PITTSBURGH (AP) — Ben Roethlisberger left Heinz Field on Monday night with his sprained right shoulder in a sling. When he walks back in ready to play is anybody's guess.

Mike Tomlin called Pittsburgh's franchise quarterback "questionable" but otherwise offered little detail Tuesday, less than 24 hours after Roethlisberger was pounded into the ground by Chiefs LBs Tamba Hali and Justin Houston in the third quarter of Pittsburgh's 16-13 overtime victory.

"He is being evaluated," Tomlin said. "Obviously this injury puts his participation in the questionable category for this week."

Roethlisberger left the game and went to the hospital to for an MRI-exam. He underwent more tests on Tuesday to determine the severity of the sprain to the sternoclavicular (SC) joint in his throwing shoulder.

The SC joint connects the collarbone to the sternum. Treatment can range from a few days of rest and ice to as much as 4-6 weeks according to Dr. Victor Khabie, chief of sports medicine at Northern Westchester Hospital in Mount Kisco, N.Y.

"You could tape it, you could do that stuff but the reality is those ligaments just have to heal," Khabie said. "If you go throwing, you slow down the healing process."

Roethlisberger was scrambling in the pocket to buy time on Pittsburgh's first possession of the second half when Houston wrapped up Roethlisberger's legs and Hali slammed into him, driving the quarterback's right side into the damp Heinz Field turf. Roethlisberger didn't appear to be hurt walking off the field but quickly made his way to the locker room before leaving the stadium with the game still in progress.

"It didn't seem like a tough hit ... but he came to the sideline and next thing you know he was gone," Pittsburgh OLT Max Starks said. "I'm hoping it was nothing serious. Honestly it didn't seem like it."