McGowan has been performing the role of The Wonderful Wizard of Oz in various companies of Wicked since 2009. He first played the Wizard in the original Second National Tour production, beginning March 7, 2009. He finished with the touring company on December 6, 2009, transferring to the San Francisco production, playing the Wizard from December 22, 2009 through September 5, 2010, when the production closed. He then returned to the Second National Tour, resuming performances on January 11, 2011 and concluding his performances on the tour on April 17, 2011.