Norris, 22, had posted a 3.86 ERA in his first five starts, the lowest of Toronto's five starters. The team called up left-hander Andrew Albers, and Marco Estrada will take Norris' spot in the rotation.
After Albers tossed 2.2 innings in Toronto's 9-4 loss to Cleveland Friday night, allowing a home run and two walks, the Blue Jays sent him back down to Triple-A along with outfielder Dalton Pompey.
Pompey, a 22-year-old rookie, began the season as Toronto's starting center fielder. He was hitting .193/.264/.337 in 83 at-bats, and struck out 22 times while walking just six.
The Blue Jays selected the contracts of outfielder Ezequiel Carrera and right-hander Scott Copeland to take their places on the 25-man roster.
- Jeremy Woo