Saints right tackle Bryce Harris, a third-string rookie making his first start, has left Sunday's game against San Francisco with an apparent right leg injury.
Eric Olsen, a third-year pro who is normally a reserve guard, has entered the game in Harris' spot and is the fourth player this month to play in the Saints' right tackle spot.
Harris went down in the first quarter while blocking on Mark Ingram's short run. He was carted to the locker room for X-rays.
Zach Strief, the regular starter at right tackle, hurt his left groin Nov. 5 against Philadelphia. He practiced this week, but was not activated. His backup, Charles Brown, hurt his right knee in Oakland a week ago.