Frank Thomas of the New York Mets ties a major league mark by being hit by pitch twice in one inning. Art Mahaffey and Frank Sullivan plunk Thomas in the seven-run 4th inning at the Polo Grounds in the Philadelphia Phillies’ 8 – 0 defeat.

On April 29, 1962 — Frank Thomas of the New York Mets ties a major league mark by being hit by pitch twice in one inning. Art Mahaffey and Frank Sullivan plunk Thomas in the seven-run 4th inning at the Polo Grounds in the Philadelphia Phillies’ 8 – 0 defeat.

Source
Baseball Reference April 29