Ray injured his right shoulder in the first quarter of Toronto's 35-14 home loss to Calgary on Friday night. After throwing an incompletion on the run, Ray put his right arm to brace his fall after taking a clean hit from Stampeders' defensive lineman Charleston Hughes.
Ray left the game and didn't return.
Afterwards, Charleston said he received multiple threatening e-mails through his personal website for the hit. On Thursday, Milanovich told reporters the nature of Ray's injury and said any threats directed at Charleston are unwarranted.
"I think it's ridiculous," he said. "It was a clean hit.
"The guy plays hard and is a good football player. I didn't think twice about that hit."
Backup Zach Collaros will start for the Argos (5-3) when they host the Montreal Alouettes (3-5) on Tuesday night.