The Padres reassigned McCoy to minor-league camp Monday.
McCoy signed a minor-league contract, which includes an invitation to big-league spring training, with the Padres on Sunday, Dennis Lin of The Athletic reports.
McCoy was designated for assignment Wednesday, Mike Wilner of the Toronto Star reports.
McCoy was optioned to Triple-A Buffalo on Friday, Kaitlyn McGrath of The Athletic reports.
The Blue Jays selected McCoy's contract from Triple-A Buffalo on Tuesday.
The Blue Jays acquired McCoy from the Mariners on Wednesday in exchange for Trent Thornton, Jeff Passan of ESPN.com reports.
The Mariners reassigned McCoy to minor-league camp Monday.