Complex sentence: After one season in Cleveland, he filled the same role with the Patriots for four seasons (2001--2004) under long-time friend Bill Belichick; helping lead New England to 3 Super Bowl victories: (2001,2003, & 2004).
Split into simpler sentences: After one season in Cleveland, he filled the same role with the Patriots for four seasons (2001--2004) under long-time friend Bill Belichick. Crennel helped lead New England to three Super Bowl victories (2001,2003, & 2004).