5-time Grammy winner Al McKay joined Earth, Wind and Fire’s founding members, the brothers Maurice and Verdine White, in 1973 at the start of the group’s classic period. One of the most influential and innovative guitarists of his generation, McKay’s rhythm guitar was a staple ingredient of all Earth, Wind and Fire’s biggest successes, including the singles Boogie Wonderland, September, After the Love Has Gone, Let’s Groove, and Fantasy.