Rainer Klaus Wirth Castro (born 25 October 1982) is a Chilean former professional footballer who played as a goalkeeper. Club career Universidad Católica Born in Santiago in 1982, a son of the famous goalkeeper Oscar Wirth, Rainer joined Universidad Católica youth ranks in 1994, when he was 12. Eight years later, he was promoted to Católica's first team, being designated as the second-choice goalkeeper under the American Jonny Walker. In the 2002 season, Wirth won the Apertura Tournament title. The next year, on 15 April, he debuted in the 2003 Copa Libertadores, in a 1–1 draw with the Brazilian side Paysandu. After of years of regularly playing for Católica and a loan completed to Deportes Temuco in January 2006, in June of that year, he returned from his loan because the record-man José María Buljubasich was operated on for a benign brain tumor. He played all the second semester of the season with Católica. His contract was not renewed and he was released from the club in December. Colo-Colo On 5 January 2007, Wirth moved to rival team Colo-Colo for an undisclosed fee; the same month he traveled to England to try out with Premier League club Manchester City. It was revealed that the Chilean played very well, but the club was not looking for a goalkeeper. Wirth was originally signed as second-choice goalkeeper, as back-up to Sebastián Cejas. On 27 January, he made his club debut in a 2–1 win over Deportes Melipilla, replacing the injured Cejas in the 45th minute. On 5 May, after of the elimination of Colo-Colo in the Copa Libertadores, Wirth played his second game for the club, in the 2−2 away draw with Cobreloa, the full 90 minutes. He won his third professional title after a successful championship of Colo-Colo, only losing one match of twenty, that was against Audax Italiano in a 1–0 loss with goal of Rodolfo Moya. Despite Cristián Muñoz's joining the team, after the Cejas' departure of the club, Wirth played in Colo-Colo's opening game of the Clausura Tournament, and his club won 4–1. On 2 August 2007, Wirth was chosen ahead of Muñoz to start in the Copa Sudamericana first stage game against Real Potosí. He produced a man-of-the-match performance, saving numerous challenging shots which helped Colo-Colo to draw the game 1–1. Wirth continued his run of starts in his next six appearances, contesting the post with the goalkeeper