The 29-year-old was signed by Oakland as an amateur free agent in 2008, and he was with the D-backs from '12-14. Schultz spent seven years in the Minors and compiled a 37-29 record with a 4.37 ERA. This year in Reno, he struck out 82 and walked 46 over 135 1/3 innings.
Toronto has 38 players on its 40-man roster. Right-hander Chad Jenkins, infielder Maicer Izturis and third baseman Brett Lawrie will have to be activated off the 60-day disabled list and added to that list after the World Series.
The number of open roster spots shouldn't be a concern, because other players will be removed in the coming weeks. Right-hander Casey Janssen, left fielder Melky Cabrera and center fielder Colby Rasmus are free agents. Team options on Dustin McGowan, Brandon Morrow, Adam Lind and J.A. Happ also could play a role.
Gregor Chisholm is a reporter for MLB.com. Read his blog, North of the Border, and follow him on Twitter @gregorMLB. This story was not subject to the approval of Major League Baseball or its clubs.