Joseph Williams of Toto at Denver’s Day of Rock, May 26, 2012

Joseph Williams of Toto at Denver's Day of Rock, May 26, 2012

Singer Joseph Williams belts out “I Won’t Hold You Back” as Toto headlines the main stage at Denver’s Day of Rock, May 26, 2012. (Daniel J. Schneider)

Singer Joseph Williams belts out “I Won’t Hold You Back” as Toto headlines the main stage at Denver’s Day of Rock, May 26, 2012. (Daniel J. Schneider)