Steelers quarterback Ben Roethlisberger returned to practice today, wearing a wrap on his left knee, the only sign of the "injury" from Wednesday's practice. And teammate Willie Parker revealed that it was a collision between the running back and quarterback that caused the temporary problem that led to Roethlisberger limping off the practice field Wednesday. "Actually, me and him bumped knees on a certain play," Parker said. Parker then laughed as he said, "But he's definitely all right and he's a competitor. I guess he just likes a lot of attention sometimes and he likes being the little baby, but Ben is definitely a warrior."