It's not entirely clear what this does to Encarnacion's time-table, but MLB.com's Gregor Chisolm's hazards this educated guess:
In other words, I find it doubtful that Encarnacion returns on this current road trip. If there's no more setbacks, maybe vs Bal on Aug. 5.— Gregor Chisholm (@gregorMLB) July 26, 2014
It doesn't sound like any sort of major stumble, but the downward-trending Blue Jays very much need their best hitter back in the lineup ASAP. This season, the 31-year-old Encarnacion is batting .277/.368/.591 (160 OPS+) with 26 homers in 88 games.