Broncos cornerback Dominique Rodgers-Cromartie suffered an injury scare about 20 minutes into practice Thursday but later returned to the field for scrimmaging and is going to be "fine" coach John Fox said.

Rodgers-Cromartie who signed a one-year $5 million contract with Denver as a free agent in the offseason and is the team's second-highest paid defensive player was helped to the locker room with what appeared to be a back injury. When he returned he was asked by Fox about his injury and pointed to his back.

"He's got a bump on his back but he's fine" Fox said.

This was the second injury scare for Rodgers-Cromartie. Early in training camp last month he was carted off the field with a high-ankle sprain.

Meanwhile slot receiver Wes Welker — another big free-agent signee — did not participate in 7-on-7 and 11-on-11 half-speed drills but would be available to play Saturday if it were a regular-season game Fox said. Welker is recovering from a mild ankle sprain and still might play Saturday against the visiting St. Louis Rams when the No. 1 offense will take its most snaps of the preseason.