Through the end of July in 1966, Oliva was leading the league with a .328 average. However, between August 21 and August 28 and September 13 and September 21, he slumped badly, collecting three hits in 29 at bats and four hits in 34 at bats respectively, which cost him a chance at his third straight batting title. Oliva finished with a .307 batting average and was the runner-up to Triple Crown winner and AL MVP Frank Robinson, who hit .316. For the third year in a row, Oliva led the AL in hits (191). Additionally, he won his only Gold Glove award, and finished sixth in MVP voting. One of the season's highlights came on June 9, 1966, in the seventh inning of a game against the Kansas City Athletics, where Oliva joined Harmon Killebrew, Don Mincher, Rich Rollins and Versalles to hit five home runs in a single inning. These five home runs, hit off starter Catfish Hunter (three) and reliever Paul Lindblad (two), still stand as an MLB record for the most home runs in a single inning.