Guerrero began distance running when he was 15 years old, but did not join a competitive team until his sophomore year at Tulane University. He walked-on to the team that season and would later be named team captain for track and cross country as a senior.
After graduating from Tulane with bachelor of arts degrees in both Political Science and French, Guerrero became a French teacher and cross country coach at Compton High School. While at Compton, he continued his education and earned a master's degree in Education from Cal State Dominguez Hills. Guerrero then moved on to Chadwick High School in Palos Verdes where he was honored as Prep League Coach of the Year in 1995 and 1997.
Guerrero left the high school arena to take on the assignment of Financial Services Representative at SunAmerica, Inc. However, his passion for running and coaching brought him back to LMU in 1998.
Throughout his athletic career, Guerrero has competed in seven marathons including Los Angeles (1991, 1993), Boston (1992, 1996) and New York (1994). His personal best marathon time is 2:57:09.