Warren Spahn and 23 other signatures on a Worth baseball JSA Full Letter Certified YY48536. JSA was able to identify the signature of Hall of Famer Warren Spahn along with the signatures of Ned Garver, Gene Woodling, Rick Folkers, Wayne Garrett, Clay Carroll, Virgil Trucks, Boog Powell, Bob Buhl, Chuck Stobbs, and Gary Peters as key signatures. It also includes the signatures of Bob Keegan, Ken Frailing, Jerry Lynch, Hal White, Paul Pryor, Rudy Laskowski, and Pinky May, who signed across the sweet spot.