Bennett injured his left ankle running routes last week at the team's Valley Ranch training facility. Cowboys officials said that the ankle has some swelling. An MRI on Saturday revealed a sprain but no further damage.
"He'll be back quick," owner/general manager Jerry Jones told ESPNDallas.com following Saturday's practice. "It's not serious."
Rookie safety Akwasi Owusu-Ansah (shoulder) was also placed on the NFI list.
The Cowboys also missed backup wide receiver Sam Hurd, who's wife had a baby Friday. Hurd is expected to arrive for Sunday's practices.