The R&B group that formed 60 years ago in 1964 will be reveling in their own “good times” when they are inducted into the Rock & Roll Hall of Fame on Saturday in Cleveland, Ohio.

In its statement, Kool & the Gang described Sumler as “our longtime wardrobe valet” and said he worked with the band from 2000 to 2015, “making sure the guys looked their best on stage every ...