Draughn played in three games for the Baltimore Ravens last season, rushing for two yards on four carries.
He was later released and signed with the Indianapolis Colts, but played in no games.
Two years ago with the Kansas City Chiefs, Draughn played in every game and rushed for 233 yards and two touchdowns. He caught 24 passes for 158 yards.
Draught went undrafted out of North Carolina and signed with the Washington Redskins. For the Tar Heels, he rushed for 2,070 yards and 10 touchdowns.
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Aaron Wilson covers the Ravens for The Baltimore Sun