Posted by ESPN.com's Matt Mosley
IRVING, Texas -- Cowboys linebacker Zach Thomas didn't have his best game of the preseason, but he was still active. After being sidelined because of a concussion last season in Miami, some people counted Thomas out. But he's still covering a ton of ground and he's picked up Wade Phillips' 3-4 defense in a hurry.
"If I felt like I lost a step, I would have retired already. Because of the 13 years that I've been in the league, some people may think I've slowed down and maybe can't cover anymore, and that's fine with me. They say you'll know when it's time to shut it down, but I still enjoy it. It's still fun to run around and just tackle people. That's my job and it's pretty simple."