The often dour Adair brought a light bat, steady hands, and a tough attitude to the game. Hit in the mouth by a wild throw during the first game of a doubleheader in 1964, he took 11 stitches and returned to play the entire second game. He holds the ML record (with Bobby Grich and Joe Morgan) for fewest errors in a season by a second baseman (five, in 1964). He also set ML records with 89 consecutive games and 458 chances without an error from July 22, 1964 to May 6, 1965 with the Orioles.
After hitting .300 for Hankyu in Japan in 1971, he returned to the States and was a coach for the A’s and the Angels.