Soiled and game prepared "muddied" baseball used in Tom Seaver's 300th career victory on August 4, 1985. The ball has been signed on the sweet spot by Seaver in blue felt tip marker and MLB Commissioner Peter Ueberroth on side panel in black felt tip marker. Both signatures rate 8 out of 10. Side panel displays a period ink inscription from American League umpire John Shulock who worked at home plate during the milestone game. Seaver battled through nine innings to throw a complete game earning his membership into the exclusive 300 Win Club. As remarked by New York reporter Bill Madden, "Whenever he talked about it in the years after, Seaver always said he was most proud of win number three hundred being a complete game.” The ball was retained by American League umpire John Shulock who had worked home plate during the game. Shulock had Seaver and MLB Commissioner Peter Ueberrith sign the ball as noted within the accompanying letter of provenance. Includes full LOA from PSA/DNA and letter of provenance from Umpire John Shulock: Ball: VG-EX, Signatures: NM-MT