Before and during his time at California State University, Northridge Rosales played with the Boyle Heights Giants traveling baseball team est.

1988, and the East L.A. Dodgers, a SCC baseball team, his number 11 was retired on December 15, 2008.

He played in the winter of 2007 in the Mexican Pacific League with the Naranjeros de Hermosillo.

After not pitching for any teams in 2011, Rosales returned to baseball in 2012 with the Acereros de Monclova of the Mexican League.

On May 27, 2014, Rosales signed with the Leones de Yucatán of the Mexican Baseball League.