1978 New York Yankees World Champions Team Signed Baseball. This Official American League (MacPhail) baseball has 24 signatures, 19 of which are authentic and 5 are clubhouse version. Signatures include Reggie, Lemon, Berra, Chambliss, Howard, Gossage, Guidry, Lyle, Dent and more. Clubhouse signatures include Munson, Pinella, Spencer, Randolph and Nettles. Signatures range 7-8/10 and the ball is EX with a few toning spots.