4. Riley experiment, a work in progress. Rookie Duke Riley is not off to a good start. Linebackers coach Jeff Ulbrich has to get his star pupil ready to play like he did Deion Jones and De'Vondre Campbell last season. Riley missed four of his six attempted tackles and now has eight missed tackles. His 2.1 tackle efficiency (attempted tackles per missed tackle) ranks last among 33 4-3 outside linebackers this season, according to profootbabllfocus.com.
5. Kazee is a keeper. Rookie Damontae Kazee played well. He probably could have broken on a pass to Bills tight end Charles Clay, who had beaten strong safety Keanu Neal. He was late getting over the top to blow up the play. However, he had three tackles, allowed just one catch for a year and earned a game grade of 82.7, which was 10th among safeties to play before the Sunday night game.
• For updates on the Las Vegas shooting, download the AJC Breaking News app