Philadelphia recalled Backhus from Triple-A Lehigh Valley on Tuesday.
Backhus will make his fourth stint with the big-league club after being called up Tuesday. In 21 appearances this season, the 28-year-old owns a 4.95 ERA, 1.55 WHIP and 20:6 K:BB over 20 innings. Philadelphia sent Jesus Luzardo (shoulder) to the injured list, opening a roster spot for Backhus.