Official American League baseball as used in 15 inning game played between the Philadelphia Athletics and Washington Senators. The ball originated from the personal collection of Hall of Fame member Al Simmons who was teammates with Athletics' pitcher Ed Rommel. Walter Johnson lasted an incredible 15 innings to capture the opening season victory by a score of 1-0. Ball shows heavy use and is inscribed on side panel, "Last Ball that won 15 inning game 1-0 Ed Rommel vs. Walter Johnson April 13, 1926". The inscription and signature within were confirmed to be in Ed Rommel's hand. The baseball itself was identified to the 1926 season with regard to stampings confirmed by MEARS Authentication under magnification. Unique game used artifact as a testimonial to the iconic pitching prowess of Walter Johnson as one of the greatest hurlers in the history of the game. Includes full LOA from JSA (Rommel signature/inscription), LOA from MEARS Authentication (Baseball), and page from original catalogue offering confirming Al Simmons Collection provenance: VG