Robert Joseph Guerrero (born March 27, 1983) is an American former professional boxer who competed from 2001 to 2017. He is a three-time world champion in two weight classes, having held the IBF featherweight title twice between 2006 and 2008, and the IBF junior lightweight title from 2009 to 2010. Additionally he held the WBA interim and WBO interim lightweight titles in 2011, and the WBC interim welterweight title from 2012 to 2013.