Plouffe (knee) is out of the lineup Sunday against the Mariners, Phil Miller of the Minneapolis Star Tribune reports.
It's Plouffe's second straight absence due to the right knee injury. While he's said to be dealing with only a bruise, Plouffe isn't expected to require a stint on the DL, and may be ready to return to full-time duties at third base at some point during the Twins' series with the Athletics that begins Monday.