"The Hawks are down to one healthy center and must step up their ongoing search for help at the position.

Jason Collins had an MRI on his sprained left elbow Friday. The team is waiting on the results of the test for a better indication of how much time Collins will miss. However, coach Larry Drew ruled Collins out for Saturday's home game against the 76ers.

"Right now they are calling it a real bad sprain," Drew said. "We'll see if there is other damage."

Collins was injured in the first quarter of Thursday's blowout loss to the Grizzlies. His arm was pinned by the Grizzlies' Dante Cunningham while on the floor going after a loose ball. An X-ray was taken, and the injury was ruled a sprain. The Hawks have already lost starter Al Horford after surgery to repair a torn left pectoral muscle.

Meanwhile, the Hawks' pursuit of free-agent center Kenyon Martin appears to have ended unsuccessfully. The Hawks met with a representative of Martin on Thursday. However the Los Angeles Times reported Friday that Martin, who was playing in China, has agreed to a contract with the Clippers. The deal is pending a physical.

"It hasn't been a secret we've been looking at some guys," Drew said. "When Al went down we began our search. We had a list of names we were looking at. The search is going to have to continue now [following the injury to Collins].

Collins did not practice Friday. He was at Philips Arena following the end of the session. He wore a sleeve on his left arm and said he felt "better.""