 Jiménez made his major league debut on October 4, 1964, and was in the starting lineup at home against the Cleveland Indians for the last game of the season.The Yankees lost the game 2–1 in 13 innings, but Jiménez went 2-for-6 with base hits against Luis Tiant and Tommy John.Jiménez, along with Clarence Dow and Tom Pratt, are the only players to have six at-bats in their only MLB game.