Babe Ruth’s first season with the Yankees, 1920, is still reverberating. He batted .376, hit 54 home runs and drove in 137 runs. Attendance at the Polo Grounds more than doubled to 1.29 million. It was the season when the future Yankees dynasty began to take shape. Ruth wore a gray wool road jersey that season to perform in Boston, St. Louis, Chicago, Cleveland and the three other American League cities. “Ruth, G. H.” is still visible on the collar in faded pink script. Blue letters spell “New York” across the chest. Dirt stains — and probably some from sweat — are evident. And now, it is the most expensive sports artifact ever sold at auction.