Complex sentence: He was a key part of the 2004 and 2005 national championship USC teams and the team and fans created the phrase "Another Touchdown Courtesy of Kirtman" describing how David cleared the way for running touchdowns with his crushing blocks.
Split into simpler sentences: He was a key part of the 2004 and 2005 national championship USC teams and the team and fans created the phrase "Another Touchdown Courtesy of Kirtman". This phrase refers tohow David cleared the way for running touchdowns with his crushing blocks.