The Blue Jays recalled Swanson from Triple-A Buffalo on Friday, Kaitlyn McGrath of The Athletic reports.
Swanson's first 12 appearances at Buffalo didn't go well, as he was tagged for 22 runs (17 earned) over 10 innings. He had been better lately though, yielding two runs with a 5:1 K:BB over his last 5.1 frames. Swanson likely won't see high-leverage work right away, but he could find himself in a prominent role if the Blue Jays ship out relievers like Yimi Garcia and Trevor Richards before the trade deadline.