Complex sentence: Méndez made his league debut for River Plate in a 2--1 away win at Atlético Rafaela on 3 March 2004, in 2006 he had a loan spell with Olimpo (loan) before joining St. Gallen of Switzerland in 2007.
Split into simpler sentences: Méndez made his league debut for River Plate in a 2--1 away win at Atlético Rafaela on 3 March 2004. In 2006 he had a loan spell with Olimpo, before joining St. Gallen of Switzerland in 2007.