Question: Who is a former professional American football quarterback who broke his left hand and had a professional American football halfback replace him however he was relieved by Tittle in the fourth quarter of the game?  
Sentence (from "Y. A. Tittle"): Yelberton Abraham Tittle Jr. (born October 24, 1926), better known as Y. A. Tittle, is a former professional American football quarterback.
Relevant evidence: Yes