Bill Cowher resigned as the Steelers' coach Friday, stepping aside to spend more time with his family one year after winning the Super Bowl title he had chased since 1992. The 49-year-old Cowher left with one year left on his contract following an 8-8 season that was a disappointment, especially after last season: The Steelers became the first team to win three playoff games on the road and then win the Super Bowl as a sixth-seeded AFC team. "History will look back on Bill Cowher as one of the great coaches of all time," Steelers chairman Dan Rooney said.