sentences:  The Rams hired Tim Walton as their new defensive coordinator.Walton retained the 4-3 defense and named Laurinaitis the starting middle linebacker to start the regular season, along with outside linebackers Alec Ogletree and Will Witherspoon.On September 26, 2013, he collected a season-high 12 combined tackles (nine solo) and broke up two passes during a 35–11 loss to the San Francisco 49ers in Week 4.