Complex sentence: In his three years with Arizona, he rushed for 1,264 yards and 9 touchdowns; however he was often injury-prone, finishing only one full season (2001) for the Cardinals.
Split into simpler sentences: In his three years with Arizona he rushed for 1,264 yards and 9 touchdowns. He often was injury-prone, however, and finished only one full season (2001) for the Cardinals.