Dickey steps in on short notice, but he'll be pitching on normal rest because Toronto had an off-day Monday. It wasn't immediately clear how long Hutchison will be out, but if he's feeling better in the next day or two, he'll likely pitch Saturday in Seattle when Toronto needs another starter.
"Hutchison is pretty sick, so there could be a chance we end up pitching Dickey [on Thursday] instead of him, depending on how he feels," Blue Jays manager John Gibbons said before an official decision had been made. "I don't know what he's got, Bay Area fever?"
Hutchison is 9-2 with a 5.19 ERA. He has been solid at home with a 2.21 ERA, but has struggled on the road with a mark of 8.81.
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.