Delbert McClinton sat in with the Allman Brothers last night at Cynthia Woods Pavilion in Houston, TX, as the group concluded the second leg of its summer tour. McClinton joined the group for Feel So Bad midway through the set. Delbert is a Grammy Award-winning singer/songwriter who has collaborate with many well-known artists including Bonnie Raitt, Tom Petty, Emmylou Harris, Wynonna, Vince Gill, B.B. King, John Prine and Melissa Etheridge. He also penned B Movie Boxcar Blues’ in 1978, which was later covered by the Blues Brothers.