Nathan Gerbe, the Buffalo Sabres' rookie left winger, suffered a setback from getting checked Saturday and could miss up to seven games.

"He's got an upper-body injury and he's going to miss somewhere from 10 days to two weeks, stemming from the hit the other night," coach Lindy Ruff said today after Gerbe skipped the Sabres' workout. "He was examined again this morning before practice, and we're just a little

concerned with how he reacted after yesterday's skate. The doctors found something and decided to keep him out."

Gerbe was hit by New Jersey's Jamie Langenbrunner and failed to finish the game. He did practice Monday.

Clarke MacArthur replaced Gerbe on the line with center Derek Roy and right wing Drew Stafford. MacArthur was a healthy scratch against the Devils.

Defenseman Teppo Numminen missed today's practice for a previously scheduled checkup with his heart doctors. The 40-year-old has routine visits after getting a valve replaced in September 2007.

On the positive injury front for the Sabres, Patrick Kaleta is cleared to play. The right winger had been out with a neck injury but will dress Wednesday when New Jersey visits HSBC Arena.