"As soon as he swings, he kind of went down on a knee, you know something is up," manager Robin Ventura said. "You know you weren't going to let him swing after that."
Viciedo will be re-evaluated in Chicago on Friday, but he doesn't believe the injury will require him to be placed on the disabled list.
"I don't think so," he said through interpreter Lino Diaz. "I don't think it's that bad."
Viciedo recorded one of Chicago's two hits off Blue Jays starter R.A. Dickey in a 3-1 loss.
Chris Toman is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.