Cleveland Browns running back Jamal Lewis said he's frustrated by another losing season and believes coach Eric Mangini is pushing his players too hard. Lewis, who intends to retire after this season, said Thursday that he doesn't want to be a "babysitter" to Cleveland's younger players.
Browns rookie running back James Davis had a short run in his first NFL season. Davis, whose impressive exhibition season led to speculation about Jamal Lewis' future in Cleveland, will miss the rest of the season with a shoulder injury. The Browns placed him on injured reserve Saturday. Davis got hurt in the Browns' season opener against Minnesota on a hit by Vikings cornerback Antoine…