San Diego’s Tony Gwynn goes 3 for 4 in an 8 – 2 win over Cincinnati to raise his batting average to .362, best in the majors. Gwynn will finish the season at .351 to win his first National League batting title.

On July 26, 1984 — San Diego’s Tony Gwynn goes 3 for 4 in an 8 – 2 win over Cincinnati to raise his batting average to .362, best in the majors. Gwynn will finish the season at .351 to win his first National League batting title.

Source:
Baseball Reference July 26