San Francisco's M&M Boys were the third-most prolific pair of HR hitters in history, their 801 combined homers as teammates ranking behind only Aaron/Mathews and Ruth/Gehrig. But they reigned supreme among those tandems in friendship, rooming together on occasion and even accompanying each other on Mays' first date with his future wife! Not to mention that they led the Giants to the 1962 World Series and 1971 NLCS, as well as co-starred on the iconic 1967 Topps "Fence Busters" card.

Proudly presented here is one of the best Mays/McCovey crossover pieces that's reached the auction block. This H&B 35", 32.8-oz. bat was ordered by Stretch, features his engraved name, and shows his recognizable use characteristics, yet also boasts definitive game use by the Say Hey Kid. As such, it's an extremely rare example of a double-Hall of Famer, dual-used gamer—and it comes directly from the personal collection of Hall of Fame umpire Doug Harvey to boot.

Indeed, the provenance couldn't be more iron clad, with PSA/Taube's letter explaining, "The first '4' in McCovey's number '44' on the knob has been modified to read as a '2' hence the number '24,' which was worn during the labeling period by Giants teammate, Willie Mays. The alteration appears to be vintage. Reviewing Mays' ordering records, we can confirm his use of 35 inch bats with weights of 32 to 34 ounces. Additionally, the W215 model was ordered by Mays in June of 1972. Both McCovey and Mays did use bats with a mid-to-upper handle pine tar application and bats of each player in our database have ball marks on the left, right and back barrel. It's our opinion, the bat was used by both players, to what extent by each we cannot determine."

Excellent use overall with ball stitch impressions and white-leather scuffs; cleat marks; green bat-rack streaks; and moderate pine tar. Graded GU 8. Full LOA from PSA/Taube.