After five seasons as the Oilers' defensive end, Childress moved to defensive tackle in 1990 when defensive coordinator Jim Eddy switched from a 3-4 defense to a 4-3 scheme, necessitating an extra lineman. Childress was already a Pro Bowl end and had even filled in at nose guard on occasion. After the move, he would end up as a Pro Bowl selection in Hawaii four more times as a defensive tackle. As a testament to his excellence, four of the eight lowest single-season rushing totals allowed in Oilers history came between 1990 and 1993, with Childress at tackle.