The Packers lost Dietrich-Smith in the second quarter of Thursday's game against the Detroit Lions.
Dietrich-Smith also left the Nov. 10 game against the Philadelphia Eagles because of a knee injury. It was not immediately known if the two injuries were related, however Dietrich-Smith was not listed on the Packers' injury report this week.
Newhouse had started the previous two games at right tackle while Don Barclay was out with a knee injury. Barclay returned against the Lions.