Manning told a Houston radio station he broke his tibia but needed more X-rays and an MRI to know the extent of the damage.
Lions QB Stafford hurts leg in loss to Falcons →
"I've got to protect myself," he said. "If somebody's going to go low on me, I've got to get low too. The low man wins. I'm not going to change the way I run one bit."
Titans' Battle 1st RB fined under new NFL hit rule →