MIAMI -- The Miami Dolphins walked off the field victorious and still in playoff contention. By the time they reached the locker room, they had been eliminated.
Miami began the weekend with only a slim chance at the playoffs and will sit them out for the 10th time in 11 years.
"The NFL has a system in place -- six teams earn a spot in the playoffs," first-year coach Joe Philbin said. "It is what it is."
"We just have to move forward and learn from past experiences," Tannehill said.
The Bills (5-10) came into the game assured of missing the playoffs for the 13th consecutive season, leaving coach Chan Gailey's job in jeopardy. They missed a chance at a sweep of the season series with Miami.
While Bush led an efficient offense, safety Reshad Jones recovered two fumbles and made an interception at the Miami 1 with 71 seconds left to seal the victory. The Dolphins forced four turnovers playing with a patchwork secondary that included starting cornerback Dimitri Patterson, acquired Tuesday after being waived by Cleveland.
Bush's first TD catches of the year covered 17 and 12 yards from Tannehill, helping Miami build a 24-3 lead. Bush also ran for 65 yards, including a 1-yard touchdown.
"Reggie is a versatile player," Tannehill said. "When you have a guy like that, he's a real weapon."
Miami went 7-for-14 on third down and didn't commit a turnover. Tannehill threw for only 130 yards but had a passer rating of 93.8.
Nate Kaeding, signed during the week by Miami, made a 45-yard field goal but had a 46-yard try blocked by Alex Carrington.
Missed chances hurt the Bills. Stevie Johnson lost a fumble at the Miami 17 and dropped a pass in the end zone, when Buffalo settled for a field goal. That came after Spiller's career-best 62-yard run.
"I was probably trying to do a little too much, running too fast," he said. "I felt like I was going, going, going and trying to do the most right now, and it didn't come out right for me."
NOTES: Miami CB Sean Smith hurt his left knee in the second half. ... For the Bills, TE Scott Chandler left the game in the first quarter with a left knee injury. FB Dorin Dickerson was carted off the field late in the fourth quarter with a right ankle injury. ... SS Da'Norris Searcy hurt his groin in the second quarter. CB Stephon Gilmore left with a head injury in the third quarter. ... Carrington's four blocked kicks on the season (3 FGs, 1 PAT) are the most ever by a Bills player since the statistic was first tracked in 1988.
Copyright 2012 by The Associated Press