The third baseman could still join the team this coming Thursday, when the Blue Jays are in Kansas City, because the move was made retroactively. While playing with Triple-A Las Vegas, Lawrie suffered the injury Wednesday after getting hit by a pitch.
"He was hit, as we know, with a pretty severe fastball," Toronto manager John Farrell said. "There are still no fractures as we are able to detect. He's still sore. There's some increase in strength, but I think our optimistic view [from] when he was initially hit is going to take a little bit of time."
There had been speculation Lawrie would join the team for this weekend's series in Baltimore. However, Farrell said there was no rush to get him to the big leagues.
"We just have to be sure we take every precaution with him and make sure he's completely healthy before he gets back in the game," Farrell said.
Lawrie, 21, has batted .354 with 15 home runs and 49 RBIs in 52 games with Las Vegas this season.
Todd Karpovich is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.