Colts coach Dungy calls it quits, will be succeeded by assistant Caldwell

Nfl Notes

Steelers: : When Ben Roethlisberger went down two weeks ago after being struck by two Browns defenders, the quarterback suffered more than a concussion. He suffered a spinal-cord concussion that caused his arms to go numb, the Pittsburgh Post-Gazette reported yesterday.

It's the same injury that ended Ravens safety Dawan Landry's season when his helmet struck the knee of Browns running back Jamal Lewis in September.

Roethlisberger quickly regained feeling in his arms after being carted off the field Dec. 28, and he went on to throw for 181 yards and a touchdown in Sunday's playoff win against the Chargers.

Cardinals: : Starting tight end Stephen Spach is out for the playoffs with a torn knee ligament.

Spach tore his right anterior cruciate ligament during the Cardinals' victory over Carolina on Saturday.

Jaguars: : Gene Smith was promoted to GM.

Titans: : Running back Chris Johnson wore a walking boot on his injured right foot after an ankle sprain knocked him out of the playoff loss to the Ravens.

All-Pro center Kevin Mawae needs surgery on a partially torn tendon in his right arm. He will miss the Pro Bowl.