The Texans placed Phillips (shoulder) on the active/PUP list Wednesday, Aaron Wilson of KPRC 2 Houston reports.
The 27-year-old played in all 17 regular-season games for Baltimore last season, but he missed both playoff contests with a shoulder injury that apparently still isn't 100 percent healthy. Phillips signed a one-year deal with Houston in the offseason and will serve as a depth linebacker while filling a key role on special teams.