The Saints placed Thomas (knee) on injured reserve Tuesday, Brooke Kirchhofer of NewOrleans.Football reports.
Thomas sustained a knee injury on the opening drive in the team's last game Week 10 at Minnesota and wasn't able to return. Afterward, coach Dennis Allen called it a "fairly significant" issue, and following a Week 11 bye, he added that Thomas was "going to take some time" to get healthy, per John Hendrix of SI.com. With the veteran wideout sidelined, Rashid Shaheed and rookie sixth-rounder A.T. Perry should handle expanded roles.