Updated

By Simon Evans

MIAMI (Reuters) - Seven teams remain in contention for the AFC's two wild card places before Sunday's final round of regular season play in one of the most complex playoff run-ins for years.

While all the NFC's playoff spots have been taken and only the positioning is at stake on Sunday, there are all manner of scenarios in the other conference.

Such is the complexity that Miami Dolphins coach Tony Sparano talked about his team being out of the running following Sunday's defeat to Houston. It was not until several hours later that he realized not all hope was lost.

To underline how odd that situation is, last year the New England Patriots did not make the playoffs despite an 11-5 record.

Add to the mix the defending Super Bowl champions, the Pittsburgh Steelers who, after surprise defeats to Cleveland, Kansas City and Oakland, now face the likelihood of missing out on the knock-out phase.

Mike Tomlin's team, who started the year among the favorites to win another Super Bowl, need to win at Miami and then hope for other results to help them.

There are three permutations that would work for the Steelers while Miami need to win and have four results go their way.

It gets even more complicated when the tie-breaking formula is added.

There is, though, a simple way to look at Sunday's games.

If the Baltimore Ravens and the New York Jets both win then they are through to the playoffs regardless of any other results.

"We take care of business in Oakland and get ourselves in the playoffs, we can win the world championship (Super Bowl). We are capable of doing it. But it's up to us to get it done," he said.

In many people's eyes, the Jets, who face the Bengals, are fortunate to still be contenders after winning against a previously unbeaten Indianapolis Colts team who, secure of their playoff position, rested several key players from the third quarter.

The other teams in with a chance of making the post-season if results go their way are the Denver Broncos (8-7) and the Houston Texans (8-7).

(Editing by John Mehaffey)