Reliever Jason Frasor, who hasn't pitched since July 16, is scheduled to throw in a rehab game with Class A Dunedin on Thursday, and if all goes well, he will rejoin the big league club on Saturday, when rosters expand.
"It's likely he will come to us after this outing, provided there are no setbacks," manager John Farrell said. "Every throwing session he has had has been a positive one. He has bounced back, and he feels good about himself physically."
Frasor was forced to the disabled list with inflammation in his right forearm, a condition he had pitched through for a while before informing the team.
Farrell also expects catcher J.P. Arencibia, who fractured his right hand in late July, to return shortly thereafter. The team is targeting Sept. 10, but he could come back earlier.
"We don't have a definite date [for] his return, but he's making solid progress," Farrell said.
Arencibia has begun hitting off a tee and taking soft toss, and he has also been catching balls thrown from a machine to get his legs back in shape.
Before returning to the Blue Jays, Arencibia could catch for one of Toronto's Minor League affiliates that made the playoffs, such as Dunedin and Class A Advanced Lansing.
In the meantime the Blue Jays are likely to call up utility man Yan Gomes, who will serve as the third catcher.
As far as other September callups go, Farrell said that the team is looking to add three or four pitchers and that the players likely to be promoted have already been with the team at some point this season.
Outfielder Anthony Gose will be one of those players; pitchers Brett Cecil, Chad Beck and Evan Crawford could be among the pitchers who get the call.