Ben Roethlisberger sat out the final 20 minutes of the Pittsburgh Steelers' practice Wednesday after his right leg slipped while he was throwing a pass.
The problem is not believed to be serious, but backup quarterback Bryan Leftwich finished out practice as a precaution.
Roethlisberger apparently slipped in some mud on the Steelers' outdoor practice field. Coach Mike Tomlin prefers to practice outdoors most days when the Steelers are to play in a cold-weather city, as they will Sunday at home against Dallas.
Tomlin did not speak to reporters after practice. Roethlisberger was listed on the team's injury chart as being a limited participant in practice.
Wednesday's weather was mild by Pittsburgh standards for the first week of December, with temperatures in the mid-40s and a partly cloudy sky.
Titans
Tennessee backup quarterback Vince Young sat out practice with an infection in his right thumb. Coach Jeff Fisher said the Titans will not let him throw for a couple days to let the injury heal.
Fisher said Young had an infection in the corner of the cuticle of the thumb on his throwing hand. They put Young on antibiotics after the game with the weekend off.
"The antibiotics didn't do the trick. It spread a little bit, so we're just treating the infection. We expect him to play. We're just going to back him down from throwing the next few days," Fisher said.
Young's thumb is a bit swollen and sore.
The 2006 NFL Offensive Rookie of the Year came in as a substitute for Kerry Collins and wrapped up the Titans' 47-10 win over Detroit on Thanksgiving.
Young made national news when Fisher called police for help finding the quarterback the day after he sprained his knee in September, an incident they all called blown out of proportion even though SWAT officers and crisis negotiators were on hand to assist. Collins was handed the starting job immediately after that episode.
Cornerback Nick Harper also did not practice Wednesday because of an ankle problem, and cornerback Cortland Finnegan (hamstring) sat out on one of the Titans' shortest injury reports in weeks.
