Official National League (Giles) ball signed in blue ink by the following twenty-eight members of the 1957 Pittsburgh Pirates: Clemente, Mazeroski (clubhouse signature), Face, Skinner, Thomas, Friend, B. Smith, Pendelton, Fondy, King, Douglas, Groat, Mejias, Narron, Daniels, Arroyo, Kravitz, Witt, Foiles, P. Smith, Baker, Rand, Murtaugh (clubhouse signature, Mgr., sweet spot), Powers, Virdon, Freese, Kline, and Peterson. Signatures average 7/10. Excellent condition overall. Full LOA from PSA.