Falcons rookie defensive tackle Peria Jerry suffered a sprained knee during the team's morning practice on Saturday.
The team is expected to look at Jerry's knee again on Sunday, but reports on Saturday night indicated a sprain.
"That's all we know right now," coach Mike Smith said.
In 2008, Jerry underwent arthroscopic surgery to repair a torn meniscus in the same knee he sprained Saturday.
Falcons' Jerry Has Sprained Knee