When the Allman Brothers Band resumed its summer tour on Friday in Minnesota, Warren Haynes was not on stage. Instead, Jack Pearson stepped in on guitar. Pearson, who put in a stint with the ABB from 199799 after Haynes originally left the group to focus on his efforts with Govt Mule, also contributed vocals to a cover of Dimples (the James Bracken/John Lee Hooker song long associated with Duane Allman, which Pearson had re-introduced during his time with the ABB). In addition, Ron Holloway joined the band on saxophone, as he did last month when Haynes missed the groups Philadelphia show due to illness. Pearson and Holloway will remain with the group over the next few shows while Haynes is off due to family matters. At present, the guitarist is tentatively slated to return to the band on August 19, for a show at the Montage Mountain Performing Arts Center in Scranton, Pennsylvania.