The Steelers also placed safety Troy Polamalu (hamstring) and guard Chris Kemoeatu (triceps) on the PUP list for injuries that are believed to be minor. But Tomlin admitted his disappointment over Hampton after he completed only 5 of the 8 100-yard runs, which are part of what Tomlin calls "registration" on the team's reporting day.
"Guys got to come and report between 1 and 4 (p.m.)," Tomlin said. "They've got to weigh in, they've got to take a physical, they've got to run a conditioning test, and in order to participate tomorrow morning you've got to get all those things done. Unfortunately, he didn't get an element of that done in a satisfactory manner."
Tomlin said Hampton -- who's listed by the team at 325 pounds -- won't have to undergo a re-test, but "he's got to exhibit that he's in good enough condition to participate," Tomlin said. "I'll determine that."
If Hampton doesn't prove that to Tomlin by the end of camp, he could remain on the PUP list. That would require Hampton to miss at least the first six weeks of the season. On Oct. 14, teams have three weeks to activate a player who started and finished camp on the PUP list.
"People have different struggles," Tomlin said. "Conditioning and weight appears to be one of his. It's nothing new. It's something that he's battled and I'm sure he'll continue to battle it. Just today, he's not up to snuff."
Of course, no one -- least of all Hampton himself -- expects the exile to last longer than a week to 10 days.
"First game in September, I'm going to be out there, believe that," Hampton said.
Hampton pointed out that he failed the run test under Bill Cowher in 2003, but ended the season in the Pro Bowl.
"Y'all made a big deal out of it," he said. "I know what I've got to do. I wasn't no bigger then than I am now. I know what I've got to do.
"I went to a Pro Bowl last year. If I go to one again this year, there won't be no more talk about it, right? Maybe they'll put me on the PUP every year."
(Dale Lolley contributed to this report.)