The Birth of a Dynasty: National League application letter of eventual New York Yankees at auction

1889 document of original Baltimore Orioles, the team that would become the Yankees, expected to bring $10,000+ at Heritage Aug. 5 Sports Collectibles AuctionDALLAS, TX – One of the most important documents in the early history of the New York Yankees franchise , an 1889 National League application letter – made when the team was the original Baltimore Orioles – is expected to bring more than $10,000 on Aug. 5 as part of Heritage Auctions’ Signature® Sports Collectibles Auction