Hendriks had indicated on Saturday he'd be willing to move to the bullpen, but the Blue Jays had other plans.
"The thing with Hendriks, we keep him starting if something happens or we want to insert a guy for a start to give these guys a break," Gibbons said. "He could have gone down [to the bullpen] and been a long man, but we don't want him to start backsliding because we think he can help us as a starter as the season goes on."
The 25-year-old Hendriks went 1-0 with a 2.31 ERA in two starts since being recalled from the Bisons.
Jamie Ross is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.