Phillips (pectoral) inked a one-year deal with the Texans on Monday, Adam Schefter of ESPN reports.
The Browns placed Phillips (pectoral) on injured reserve Saturday, Aaron Wilson of KPRC 2 Houston reports.
The Browns placed Phillips (pectoral) on injured reserve Wednesday, Anthony Poisal of the team's official site reports.
Phillips is believed to have sustained a season-ending pectoral injury during Sunday's loss at Baltimore, Jake Trotter of ESPN.com reports.
Phillips left Sunday's game against the Ravens with a shoulder injury and will not return, Scott Petrak of the Elyria Chronicle-Telegram reports.
Phillips recorded 10 tackles (four solo) in the Browns' 38-15 loss to the Patriots on Sunday.
Phillips had 10 tackles and one sack in Week 5's 30-28 loss to the Chargers.
Phillips tallied seven tackles (six solo) during the Browns' 23-20 loss to Atlanta on Sunday.
Phillips will start in place of the injured Anthony Walker (quadriceps) in Sunday's game against Atlanta, Anthony Poisal of the Browns' official site reports.
Phillips had seven tackles, a sack and a pass defensed in Thursday's 29-17 win over the Steelers in Week 3.