Mastro Fine Sports Auctions offered this Ex-Mt Yoo-Hoo easel back counter sign for sale in their November 2000 catalog.
They described the 11” x 14” piece as being from 1964, featuring eight New York Yankees. Moose Skowron split 1964 between the Senators (the hat he is pictured in) and the White Sox after spending 1963 with the Dodgers but was with the Yankees from 1954-1962.
From an advertising perspective, Yoo-Hoo had a long-standing relationship with Yogi Berra, their spokesman, for around two decades, starting in the late 1950s when Berra became friends with the company’s owner. Berra helped recruit investors and brought in his teammates to help promote the drink.
A few copies exist across the hobby, and when they pop up for sale, they have been selling for ~$1k, but higher prices are possible. However, replicas are available on eBay for under $20.