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A large Philly cheesesteak pizza from a Papa John's International Inc. restaurant is arranged for a photograph in Louisville, Kentucky, U.S., on Friday, May 1, 2015. Papa John's is expected release quarterly earnings results after the close of U.S. financial markets on May 5. Photographer: Luke Sharrett/Bloomberg via Getty Images

A large Philly cheesesteak pizza from a Papa John's International Inc. restaurant is arranged for a photograph in Louisville, Kentucky, U.S., on Friday, May 1, 2015. Papa John's is expected release quarterly earnings results after the close of U.S. financial markets on May 5. Photographer: Luke Sharrett/Bloomberg via Getty Images