In 2015, Daly subbed in for Rocky Moran Jr. at the Long Beach GP with Dale Coyne Racing. He then returned for the 2015 Indianapolis 500 in the Smithfield Foods "Fueled by Bacon" special run by Schmidt Peterson Motorsports, but was forced to retire before the green flag due to a mechanical failure. He replaced James Hinchcliffe for 3 rounds following Hinchcliffe's injury from a practice crash leading up to the Indy 500. He finished sixth at the second race at Detroit.