Arizona Cardinals star J.J. Watt won't be on the field for Thursday's marquee matchup with the Green Bay Packers.
Per Darren Urban of the Cardinals official website, Watt has been ruled out due to a shoulder injury.
The decision comes after Watt didn't participate in practice on Monday or Tuesday.
Watt began training camp on the physically unable to perform list because of a hamstring injury suffered during a conditioning drill. But the Cardinals activated him off the list on Aug. 23, and he's started all seven games to this point.