Kahnle threw a scoreless 12th against the Twins on Sunday to earn his first save of the season.
The Sox had already used their primary late-inning men earlier in Sunday's affair, so manager Robin Ventura gave the ball to Kahnle to close this one out. Kahnle has not allowed a run in eight of his last nine appearances, and he is making a case for a middle-inning role in next year's bullpen.