Texans Execs On Rookie DT Lopez: Toughness, Leverage And Grit Houston Texans general manager Nick Caserio and co-assistant director of player personnel James Liipfert spoke about rookie defensive tackle Roy Lopez and what it was about him that drew them to him. Author: Jun 1, 2021 The Houston Texans ended their 2021 NFL Draft by selecting defensive tackle Roy Lopez out of Arizona with the 195th overall pick. And yet … there are expectations. In a recent video published by the Texans, both general manager Nick Caserio and co-assistant director of player personnel James Liipfert spoke about Lopez and what it was about the former Wildcat that drew them to him.