 Guppy spent most of 2010 on call for Chivas USA; he was on the Chivas USA bench on numerous occasions during the season due to injuries to Dan Kennedy and Zach Thornton, before making his first team debut on September 14, 2010 in an international friendly against Chivas Guadalajara, even saving a spot kick during his team's 4–2 victory on penalties.He was formally added to the regular Chivas gameday roster in October 2010 due to Dan Kennedy's season-ending injury, and made his MLS debut on October 20, 2010 starting in goal against the San Jose Earthquakes.Guppy was not retained by Chivas USA at the end of the 2010 season, and re-signed with the MLS Goalkeeper Pool in 2011.