Jason Hatcher misses practice

ESPNDallas' Todd Archer reports from Arlington that defensive end Jason Hatcher missed Wednesday's practice with a thigh bruise.

Also, outside linebacker DeMarcus Ware attended practice, but didn't have a helmet.

Defensive lineman Rob Callaway and linebacker Brady Poppinga also missed practice for an undetermined reason.

Safety Matt Johnson, who is eligible to come off the reserve/injured list on Friday, was running off to the side. Johnson has been nursing hamstring injuries.

The Cowboys held practice at Cowboys Stadium because their practice fields were not thawed out from the snowy Christmas Day in the Dallas/Fort Worth area.

In case you wondered, Cowboys Stadium's roof and doors were closed during practice.