K. J. Costello

Kevin Richard Costello (born June 7, 1997) is an American football quarterback for the Stanford Cardinal.

Early years
Costello attended Santa Margarita Catholic High School in Rancho Santa Margarita, California. During his career, he passed for a school record 8,222 yards and 62 passing touchdowns. Rated as one of the top quarterback recruits in his class, Costello committed to Stanford University to play college football.

College career
Costello redshirted his first year at Stanford in 2016. He entered 2017 as a backup to Keller Chryst, but made his first career start against UCLA after Chryst was injured. Costello returned as the backup after the game; however, he took over as the starter prior to the eighth game of the season. He remained the starter throughout the rest of the season and finished with 1,573 passing yards, 14 touchdowns and four interceptions.