Former Texans RB Steve Slaton has signed with the CFL's Toronto Argonauts. Now 28 years old, Slaton's big-league career is likely over. He hasn't appeared in an NFL game since 2011 with Miami, and his last known free-agent workout occurred in 2012 with the Broncos. Slaton was the No. 6 overall fantasy running back in 2008, but was never the same following a spinal fusion surgery.