The Houston Texans lost Pro Bowl wide receiver Nico Collins to injury then blew a 20-3 third-quarter lead on Sunday against the Buffalo Bills.

No matter. After the Bills tied the game a 20-20 late in the fourth quarter, the Texans rallied for a game-winning walk-off field goal for a 23-20 win in the showdown of AFC Super Bowl hopefuls. With the game tied at 20-20, Buffalo had a chance to run out the clock and force overtime. But they ran off just 16 seconds on their final possession and punted from their end zone to give the Texans a short field with seven seconds left in regulation.

The Texans took advantage with a 59-yard Ka’imi Fairbairn field goal as time expired.

With the win, Houston improved to 4-1 to maintain control of the AFC South.

A second straight loss dropped the Bills to 3-2 following a scorching 3-0 start. Buffalo’s offense failed to find the end zone in the first half and struggled for a second straight game.