Plouffe left the game in the top of the sixth inning after hitting his left arm on Diamondbacks centerfielder A.J. Pollock's knee. Pollock was sliding into third on a stolen base attempt.
Plouffe will miss the Twins five remaining games this season. The 28-year-old hit .258 with 14 home runs and 79 RBI and a .326 OBP.
Entering Wednesday, Minnesota was 67-90 and in last place in the AL Central.
- Molly Geary