Multi-signed official OAL (MacPhail) baseball is distinguished by the presence of New York Yankee legends Thurman Munson and Billy Martin. 17 signatures in all grace the surface of this exceptional unblemished ball including Nolan Ryan, Catish Hunter, Jim Palmer, Bert Campaneris, Rollie Fingers & more. Signatures average 8-9/10. Prominent stampings (grading 9). Ball is EX+.