The Blue Jays designated Seabold for assignment Wednesday.
Following his acquisition from the Tigers on May 27, Seabold made five appearances out of the Toronto bullpen and gave up three earned runs on six hits and two walks while striking out one batter in 3.1 innings. The 30-year-old right-hander will give up his spot on the roster to Max Scherzer (ankle/forearm), who was reinstated from the 15-day injured list ahead of his scheduled start Wednesday versus the Phillies.