Sources: Mike Singletary's job safe

In a week in which his offensive coordinator was fired, San Francisco 49ers head coach Mike Singletary's job is safe for now, according to team and league sources.

But just because he is safe for now does not mean he is safe beyond this year. Even if the 49ers were to snap their losing streak, turn around their season and win their division, people familiar with the situation said there are no assurances that Singletary would return even though he has two years remaining on his contract after this season.

The 49ers lost Sunday at Atlanta to fall to 0-4 this season. Matt Bryant's 42-yard field goal with 2 seconds left lifted the Falcons (3-1) to a 16-14 victory.

The 49ers fired offensive coordinator Jimmy Raye on Monday and replaced him with quarterbacks coach Mike Johnson, one day after San Francisco lost 31-10 at Kansas City.

So as the temperatures drop, Singletary's seat will be warming up even more. But the 49ers believe that the NFC West is wide open, nobody will run away with the division, and Singletary still represents this team's best chance to have a winning season.

What also helps Singletary's staying power is that the 49ers do not have a logical head-coaching successor on staff that they would be confident to promote to interim head coach.

San Francisco defensive coordinator Greg Manusky has a strong reputation, but he never has been a head coach. Thus the 49ers are sticking with Singletary -- for now.

Adam Schefter is ESPN's NFL Insider. Information from The Associated Press was used in this report.