Valentin Stocker (born 12 April 1989) is a Swiss footballer who plays as a left midfielder for FC Basel.
Born in Lucerne, Stocker began his youth career with SC Kriens, playing there between 1996 and December 2005. As of January 2006 he transferred to Basel and played for their Under-21 team in the Swiss 1. Liga. He was called into the first team squad during the 2007–08 season after becoming one of the best midfielders in the reserve squad. He signed his first professional contract on his 18th birthday.
Stocker made his first team debut for FC Basel in the Swiss Cup semi-final tie at home to FC Thun at St. Jakob Park on 27 February 2008 as Basel won 1–0. He played his League debut on 2 March 2008 in the 3–1 away win also against Thun. In his third league game, on 16 March, he scored his first Super League goal against FC Sion, but he could not hinder the 4–2 away defeat. At the end of the 2007–08 Swiss Super League season and after the Swiss Cup Final, on 6 April, FC Basel won the national Double. In the league Stocker played eleven games, scoring three goals. In the last game of the season he and Marco Streller scored the two goals in Basel's 2–0 home win over BSC Young Boys and they won the championship by four points.