Closer Sergio Santos, who has been out since April 21 with inflammation in his right shoulder, threw a bullpen session on Wednesday and was scheduled to throw another on Saturday. But Farrell said Santos felt discomfort after Wednesday's bullpen, forcing the Blue Jays to alter his schedule.
"Because of that discomfort, which can be normal for a guy ramping back up, we've had to slow him down," Farrell said.
Starter Dustin McGowan has been out all season as he recovers from multiple shoulder injuries and also had his schedule slowed down. McGowan resumed throwing on flat ground in early May, but continues to feel tightness and discomfort in his shoulder.
"When he's able to even get to the mound is undetermined at this point," Farrell said.
Farrell said there was no timeline for either Santos or McGowan's return.