Fisher will serve as Toronto's opening pitcher for Saturday's game against the Orioles, Keegan Matheson of MLB.com reports.
Fisher has been one of the Blue Jays' most effective high-leverage arms this season, posting a 2.62 ERA and 0.93 WHIP across 34.1 innings. The Blue Jays will move him up to the first inning Saturday for what will be his fourth opener assignment of the season. Spencer Miles is likely to take over as a bulk reliever behind Fisher at some point during the first or second inning.