Boshers was called up from Triple-A Rochester on Wednesday, Rhett Bollinger of MLB.com reports.
Boshers was called up after Glen Perkins (shoulder) experienced a setback in his recovery and was placed on the 60-day disabled list. Boshers has an 1.42 ERA and 1.00 WHIP in 19 innings pitched at the Triple-A level in 2016. He has saved a couple games for the Triple-A affiliate but figures to work in the middle innings with the big club.