The Blue Jays recalled Burr from Triple-A Buffalo on Saturday.
Burr will fill the void in Toronto's bullpen left by Nate Pearson, who was traded to the Cubs earlier Saturday. In his last major-league outing Thursday against the Rays, Burr gave up four runs on two hits and two walks while striking out one in one inning. He did not allow a run or hit across his six prior major-league appearances, allowing just one walk while striking out five over 5.1 innings.