Toned and clear coated Official American League baseball (faded stampings) which has been signed by (23) members of the 1941 Boston Red Sox to include J.Foxx, D.DiMaggio, B.Doerr, M.Berg, T.Williams, and pitcher Lefty Grove. Grove has signed across the sweet spot with period inscription above, "300th Win July 25/41". Foxx has signed the opposite sweet spot with small "Boston" notation above not in Foxx's hand. Signatures range from 5-8 out of 10. Grove and the Red Sox were facing the Cleveland Indians in Boston with his previous few starts having fallen short of the vaunted 300 win milestone. Grove battled through 90 degree heat and outlasted the Indians pitching a complete game to earn his 300th, and final, career victory. The offered ball descended within the Grove family and includes a signed letter of provenance from Grove's second cousin. It was noted within period newspaper reports that a corroborated game ball from the 300th win (presumably the final out) was sent to the Hall of Fame in Cooperstown by Grove himself. Based on period date titling and Grove family provenance we can safely ascertain the ball to have been signed on the occasion of Grove's 300th win game and quite likely used within same. Desirable signed baseball with relation to the crowning career achievement from one of the greatest left handed pitchers in the history of the game. Includes full LOA from PSA/DNA and 1992 letter of provenance from Grove family member: Ball: VG, Signatures: Range EX-NM