The Washington Nationals announced Monday on Twitter that their star right-hander has a stress fracture in the knuckle of his right ring finger.

The team said the ongoing rehabilitation will keep Scherzer off the U.S. team at the WBC, which is in March, but he is still ”expected to be a full participant” at spring training, which starts next month.

Scherzer went 20-7 with a 2.96 ERA and 284 strikeouts last season, including a record-tying 20 in one game, for the NL East champion Nationals, becoming the sixth pitcher in major league history to win AL and NL Cy Youngs.