The 49ers have signed 5′11″, 203 pound rookie running back Kory Sheets.  Sheets played in 50 games (37 starts) in his 4 years at Purdue and he carried the ball 664 times for 3,341 yards (5.0 ypc) with 48 TD runs.  Sheets also caught 108 passes for 814 yards (7.5 avg) with 5 TD grabs at Purdue.  Sheets likely didn’t get drafted because of his 40 time of 4.55, but no one times players after the game begins.  With that in mind the 49ers’ might have something in Sheets.