The Phillies acquired Backhus from the Diamondbacks on Friday in exchange for Avery Owusu-Asiedu, Matt Gelb of The Athletic reports.
Backhus is a sidearming lefty reliever who held left-handed hitters to just a .139/.225/.278 slash line in 2025. Righty bats slashed .365/.417/.571 off the 27-year-old, so manager Rob Thomson will have to be judicious with his usage of Backhus.