"What we do have to be conscious of, too, is you don't want this thing to turn into a long-term problem," Blue Jays manager John Gibbons told Sportsbet 590 The Fan. "If it's best to nip it in the bud right now, maybe that's the smart route to take.
"It's a rib problem. It's just a small, little, tiny crack in the rib, [a] fracture."
Reyes said Thursday that he had been feeling soreness in what he thought was his left oblique since April 10 in Baltimore, and he believed he could play the infield without pain, but said he had difficulty swinging.
Over 10 games with the Blue Jays this season, Reyes is hitting .324 with three runs, three doubles and five RBIs.
Joey Nowak is a reporter for MLB.com. Follow him on Twitter at @joeynowak. This story was not subject to the approval of Major League Baseball or its clubs.