Texans coach Bill O'Brien backed his safety a day after D.J. Swearinger drew the ire of Denver Broncos quarterback Peyton Manning for a hit that concussed receiver Wes Welker.

"D.J. was not trying to do any harm," O'Brien said. "He was trying to make a play, make a tackle. The call was correct. What you continually have to do is show the guys on tape what a proper tackle is. It's not leading with the head. It's hitting with your shoulder and hitting basically between the shoulders and the waist and not above the neck area. But last night's play was a tough one to say, 'You were really at fault there.'"

Swearinger hit Welker late in the second quarter of the Texans' 18-17 preseason win against the Broncos. The safety's shoulder collided with the receiver's head as Welker lowered it to make the catch. Welker left the game shortly thereafter and was later found to have a concussion.

It is Welker's third concussion in less than a year.

Manning took issue with the play and told Swearinger so right away. Then, he threw a touchdown pass on the next play and then took a penalty for taunting when he barked at Swearinger again.

After the game, Swearinger said he was surprised his hit drew a penalty flag, but that he tried to make the play cleanly.