"Yeah, unfortunately," Gaston said. "He's been certainly playing defense better and swinging the bat pretty good, but right now he's got a sore left wrist. I don't know how long that's going to be."
Encarnacion, who has hit .274 with three homers and 12 RBIs since the All-Star break, is considered day-to-day right now. With Encarnacion out, Gaston gave infielder John McDonald the nod at third base and in the eighth spot of the order for the opener of a three-game set against Boston.
Encarnacion took part in pregame fielding drills, though Gaston noted that the third baseman's wrist is more of an issue when he swings a bat. Gaston said that Encarnacion injured the wrist -- one he had surgically repaired over the offseason -- on a diving play during Toronto's recent series in Oakland.