Your tally equals 174 games. I thought the season was 162.
The designated hitter may not play a field position and he may only be replaced by another player not currently in the lineup. However, the designated hitter may change positions to become a position player at any point during the game; if he does so, his team forfeits the role of the designated hitter and the pitcher, another player, or a pinch hitter must bat in the newly-opened spot in the batting order. The designated hitter could also become the pitcher, in which case the pitcher or a pinch hitter must hit when that spot in the batting order comes up again. Likewise, if a pinch-hitter bats for some other player (such as, hypothetically, the first baseman) and then remains in the game as the pitcher, the team would forfeit the use of the DH for the remainder of the game.
Likely due to a number of games in which he played in the outfield and moved to DH later in the game, or vice versa.....
The extra games are mostly or solely for games where he played center field and right field.