Gurode returned to play Saturday and immediately regained his spot over the ball in front of Tony Romo. However, Costa may not be going far.
Team owner Jerry Jones practically promised Costa a spot in the starting lineup, either in Gurode's place at center or perhaps at left guard, where rookie David Arkin is playing.
Jones says he' doesn't know "if anyone has had a better preseason than he's had."
On Saturday, Arkin was still at left guard on the first team, with Costa snapping for the second team.