Leinart got the nod despite just two days of practices and one walkthrough with the team. Buffalo signed Leinart after Kevin Kolb suffered a significant concussion last week. If Leinart can make some plays, he gives himself a shot of bumping Kolb out of the picture and holding onto a roster spot.
Jeff Tuel -- the Bills' Week 1 starter if EJ Manuel isn't ready -- also is active, though it's unclear if he'll see action. You can make the argument that Tuel should see significant playing time. He's an undrafted rookie who probably could use all the reps he can handle if he expects to be competitive next week against the New England Patriots.
Tuel didn't play, giving way to Thaddeus Lewis, who also joined the Bills this week. Lewis finished 7-of-16 passing for 132 yards and one touchdown, and he led the team with 51 rushing yards.