SABR has an excellent analysis focused on the triple play. Check out the link here. It's amazing the amount of information they provide. They have a complete listing of every triple play since 1876, a complete description of every triple play, triple plays by month and stadium, and much much more. I don't know how they find the time to figure this all out.
The best part of the site is triple play trivia.
- Quadruple Play- Only the first three outs were counted - 7/1/1903 6th Inning - New York Giants vs. St. Louis Cardinals.
- The Detroit Tigers turned triple plays against the Boston Red Sox on two consecutive days (6/6/1908 and 6/7/1908). Detroit's Germany Schafer started both of them (once as a 3B and then playing 2B). Gavvy Cravath (Bos) batted-into the first one and was on base for the second one. Germany Schafer is also famous for stealing 3 bases on consecutive pitches without ever getting past 2nd base.
- On 9/26/1927 Washington Senators' batter Joe Judge hit into a triple play and was not charged with a time at-bat (Sacrifice Fly).
SABR Triple Plays Link: