«In 2014, the United States Mint launched one of their most popular commemorative coin programs in recent history. The program, which honored the National Baseball Hall of Fame, included three coins sharing a common design and innovative domed shape.
Some of the unique aspects of the program were specified within the authorizing legislation for the program, which required a public competition to determine the obverse design and called for a unique domed shape so as to resemble the shape of a baseball. The public competition would receive a total of 178 design submissions with the finalist designs selected by a panel of National Baseball Hall of Fame members.
The silver dollars were struck in a composition of 90% silver and 10% copper, with a diameter of 1.500 inches, height of 0.243 inch, and weight of 26.73 grams. Proof and uncirculated versions were struck at the Philadelphia Mint with an overall maximum mintage of 400,000 pieces.»