Later on that drive , Liufau fumbled going into the end zone .
Liufau 's center , Kelley , pounced on the loose football -- the first score by a Colorado offensive lineman since Heath Irwin on Oct. 28 , 1995 .
Later on that drive , Liufau fumbled going into the end zone , but his center , Kelley , pounced on the loose football -- the first score by a Colorado offensive lineman since Heath Irwin on Oct. 28 , 1995 .