The Blue Jays don't believe it's a serious issue, and Encarnacion should be able to return in a couple of days.
"I think it's just going to be a day or two with the off-day tomorrow, so I would expect and hope that he's back during the Atlanta series at that point," Blue Jays general manager Alex Anthopoulos said Sunday morning. "We don't expect it to be too long."
The sore finger didn't seem to impact Encarnacion much at all during August. He finished the month hitting .407 with 11 homers, 35 RBIs and a 1.379 OPS. Even so, the Blue Jays are going to err on the side of caution to make sure it's not an injury that lingers for the remainder of the season.
With an upcoming three-game Interleague series in Atlanta starting on Tuesday, the club will platoon Justin Smoak and Chris Colabello at first base during Encarnacion's absence.
Gregor Chisholm is a reporter for MLB.com. Read his blog, North of the Border, follow him on Twitter @gregorMLB and Facebook, and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.