Cardinals sign RBs Stepfan Taylor, Andre Ellington, two other picks

The Cardinals announced the signing of four draft picks Friday: wide receiver Ryan Swope, tight end D.C. Jefferson and running backs Stepfan Taylor and Andre Ellington. Taylor, a fifth-round selection from Stanford, rushed for 1,530 yards and 13 touchdowns on 322 carries in 2012. Ellington, a sixth-round pick, gained 1,081 yards and eight TDs a…