Of course, a "triple-double" is a basketball term, but here, it means a game in which an MLB player hits at least one double and at least one triple. Hall of Famers are denoted by an asterisk (*).
A player's primary team is the one on which he played the most games. Years listed are the first and last of the player's entire career. 1918 is the early end of the range of seasons covered here because Retrosheet data only goes back that far.