IRVING, Texas -- Cowboys starting middle linebacker Rolando McClain returned to practice Thursday after missing Wednesday's session with a sore shoulder. Quarterback Tony Romo (back), left guard Ronald Leary (groin) and tackle Doug Free (foot) missed practice. The Cowboys, preparing for the Arizona Cardinals on a short week, didn't practice in helmets on Wednesday but did so on Thursday. Also, suspended defensive tackle Josh Brent practiced for the first time.