The Twins played 12 games to win a World Series for the first time in 1987. First, they upset Detroit 4-1 in the ALCS, and then went seven games to defeat St. Louis in the World Series.
They used three starting pitchers in the two postseason series: Frank Viola (five starts), Bert Blyeven (four) and Les Straker (three). Viola and Blyleven were tasked with getting deep into games, even though Viola started three times on three days' rest and Blyleven did so twice.
Viola pitched 31⅓ innings, Blyleven pitched 26⅓ and Straker contributed a modest 11⅔ innings in his three starts.
This left 34⅔ innings to be covered by the bullpen. Jeff Reardon took care of 10 of those in eight appearances, and Juan Berenguer handled 10⅓ innings in seven appearances. Lefthander Dan Schatzeder was also vital with 8⅔ innings in five appearances. The remaining small dose of innings went to Keith Atherton, Joe Niekro and George Frazier.
The Twins won the World Series with two workhorse starters who pitched on short rest five times, and with three main pitchers for the bullpen work.
The 1991 Twins also played 12 games to win the World Series. First, they knocked off Toronto 4-1 in the ALCS, and then went seven games to defeat Atlanta in the World Series.
Manager Tom Kelly used the exact same formula with his starters: Jack Morris started five games, Kevin Tapani started four and Scott Erickson three. Morris pitched three times on three days' rest and Tapani did so twice.
The innings were not as evenly split at the top, one big reason being Morris' 10-inning shutout in Game 7 of the World Series (as you might recall).