Bannon is starting at designated hitter and batting eighth Friday versus the Phillies.
Bannon will make his Astros debut after being called up from Triple-A Sugar Land on April 18. The 27-year-old was batting an underwhelming .190 with Sugar Land, producing one homer, seven RBI, four runs and a stolen base over 42 at-bats. With Yordan Alvarez (neck) unavailable Friday, Bannon will look to make a splash in his rare big-league opportunity.