What happened: Buffalo Bills defensive lineman Ed Oliver recorded a strip-sack against the New England Patriots, forcing a loose ball. Greg Gaines recovered the fumble to secure possession for Buffalo.

Why it matters: The defensive takeaway halted a New England drive and gave the Bills the ball back. Gaines, who was added to the defensive line group, and Oliver provided a momentum swing.

What to watch: Buffalo will look to capitalize on the turnover on its ensuing possession.