Kevin was born April 26, 1965. He attended Cortland University where he played fullback on the football team while majoring in sports management. He realized after 3 years that this wasn't the path for him. After returning home he decided to go back home and join a community theater. During a play in which he had a comedic role, he so enjoyed the crowd's reaction, that he joined his brother's (comedian Gary Valentine) improv group. He attended comedy clubs with Gary and realized he, too, had the knack for comedy. He has performed standup up for about 11 years. It was on the comedy circuit that he met Ray Romano. While Ray was getting a big break with his own sitcom, Kevin was getting recognition on Star Search. After appearing on The Tonight Show, his big break came at the 1996 "Just for Laughs" Montreal Comedy Festival. Afterward he landed a recurring role on Ray's sitcom, "Everybody Loves Raymond". He has since received his own sitcom "The King of Queens".