Copeland said he hoped he'd made a positive impression on the organization as he stood in for rookie right-hander Aaron Sanchez, whose start was skipped in order to give him extra rest.
"Hopefully the manager's and coaches' eyes are opened now, and next time something happens, I'll be up here," Copeland said.
Sanchez will get a full 10 days of rest when he takes the mound for his next outing, which is slated for Tuesday in New York against the Mets.
Copeland is 4-1 with a 1.97 ERA in seven starts with the Bisons this season.
"It's his first start for us. He definitely opened up everybody's eyes," Blue Jays manager John Gibbons said. "I think everyone thought he was good, but to go out and actually do it, it's only gonna help him out in the future."
Jamie Ross is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.