The 2013 All-Star was optioned following a disappointing outing Thursday night in New York. Delabar retired two batters, but also allowed one hit and walked three in his return.
"He needs to go down and figure some things out," Blue Jays manager John Gibbons said. "You don't like to do that, back and forth, but he went out there last night, of course he was a little bit rusty, but he wasn't real sharp. He needs to go figure some things out, and he will, but he has to get some steady work."
The move resulted in the Blue Jays playing Friday night's game vs. the Reds with six relievers. That's expected to change for Saturday when the Blue Jays will likely recall left-hander Rob Rasmussen from Buffalo.
Delabar can't be recalled for at least 10 days unless someone gets placed on the DL. He had fallen down the depth chart in recent weeks and wasn't being used enough to work through some of his control problems on the mound. He'll have an opportunity to do that in Buffalo for what he can only hope is a short stint.
"Not enough strikes, too many walks and not being able to do much with his offspeed pitches," Gibbons said of Delabar, who has a 4.91 ERA in 25 2/3 innings this season. "He needs to be able to get those over."
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.