[1] He won three consecutive NCAA (1997–1999) and four U.S. Open titles (2001–2004), scored two medals in the 58 and 60-kg division at the Pan American Games (1999 and 2003), and represented the United States at the 2004 Summer Olympics.

[4] In the same year, he picked up a silver medal in the 58-kg division at the Pan American Games in Winnipeg, Manitoba, Canada, losing only to the host nation's Guivi Sissaouri on the final bout.

[5][6] At the 2003 Pan American Games in Santo Domingo, Dominican Republic, Guerrero pinned his Puerto Rican rival Luis Ortiz to clinch the bronze medal in the 60-kg division.

[8][9] Guerrero lost two straight matches each at 1–3 in overtime to Mongolia's Oyuunbilegiin Pürevbaatar and Georgia's David Pogosian, leaving him on the bottom of the pool and placing sixteenth in the final standings.

[2] Additionally, he coached eleven wrestlers from the team, whom they later became NCAA champions in their respective weight categories, including 2012 Olympic bronze medalist Coleman Scott in men's 60 kg (132 lb).

[12] In 2009, Guerrero was appointed as head coach for the U.S. team at the FILA Junior World Wrestling Championships in Ankara, Turkey, and led his squad to a most spectacular display in 11 years.