Donald Reid Williams (September 2, 1935 – December 20, 1991), nicknamed "Dino", was an American professional baseball player.

He was a 6 ft 5 in (1.96 m), 218 lb (99 kg) right-handed pitcher who had a three-game, two-week trial in Major League Baseball for the 1963 Minnesota Twins.

Eight years later, after a successful half-season with the Triple-A Dallas-Fort Worth Rangers,[1] he was summoned by the Twins.

He made his MLB debut on August 4, 1963, against the Kansas City Athletics, in whose farm system Williams had previously toiled.

This biographical article relating to an American baseball pitcher born in the 1930s is a stub.