Complex sentence: Clatt played college football for the Notre Dame Fighting Irish, winning the national championship in 1946 and 1947was the Irish's leading rusher in 1942, recording 698 yards on 138 carries.
Split into simpler sentences: Clatt played college football for the Notre Dame Fighting Irish, winning the national championship in 1946 and 1947. He was the Irish's leading rusher in 1942, recording 698 yards on 138 carries.