Thomas, who is 5-11 and 215 lbs, was with the Saints from 2007 through 2014. He has 3,745 career rushing yards, 28 rushing touchdowns, and has averaged 4.6 yards-per-carry.
49ers running back Carlos Hyde is recovering from a foot injury while Reggie Bush is recovering from a calf injury. Jarryd Hayne and Mike Davis are both rookies.
Per Pro Football Talk, the 49ers also gave a tryout to C Samson Satele, a seven-year veteran. Daniel Kilgore is not expected to be ready to go soon and Marcus Martin has been playing poorly at center.
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