Steelers coach Mike Tomlin called defensive end Brett Keisel's hamstring injury an "issue moving forward," *The Pittsburgh Post-Gazette reported* Monday.
Keisel was injured on the first snap of the Steelers' 28-10 victory over the Cleveland Browns on Sunday, but he stayed on the field for 14 more plays and registered two tackles.
"He's got a hamstring injury," Tomlin said. "I don't know the extent of that. We got to take a look at it."
Keisel, 32, iced the hamstring after leaving the game and wore shorts on the sideline during the second half. He was the first player out of the Steelers' locker room after the game, according to The Post-Gazette.
"I'm OK," he told the newspaper.
The Associated Press contributed to this report.