Pilson briefly returned to Dio to help record the band's final studio album, "Master of the Moon". He became the bass player for Foreigner in the summer of 2004 when he joined an impromptu line-up consisting of founding member Mick Jones, Jason Bonham, Jeff Jacobs, Thom Gimbel, and Bonham singer Chas West for a benefit show for muscular dystrophy on July 25, 2004, in Santa Barbara, CA at Fess Parker's Doubletree Resort. West would be replaced by Kelly Hansen, formerly with Hurricane, who made his debut with the group on March 11, 2005 at Boulder Station in Las Vegas. Pilson has been part of every Foreigner recording and tour since, including the 2009 studio album, "Can't Slow Down".