The San Francisco 49ers are off to a rousing 5-0 start after dominating the Los Angeles Rams in a 20-7 victory. Now, the 49ers have to make sure they don't look past the 1-5 Washington Redskins, who beat the lowly Miami Dolphins in Bill Callahan's first game as interim head coach.

As long as the 49ers play their game, they should handle the Redskins. Here are four reasons San Francisco will move to 6-0 on the season.

Running Defense

Dee Ford, 49ers

Truthfully, the entire defense of the 49ers is elite. In fact, San Francisco's passing defense is even better than their rushing defense.

However, Callahan has made it abundantly clear that Washington's game plan going forward is to run the ball. This worked against the Dolphins (but it's the Dolphins).

Adrian Peterson had some great runs and I can't stress how good Ereck Flowers has been since moving to left guard. However, the Redskins still have some issues with the line and so far Peterson's only had that one good game.

The 49ers allow 87.2 rushing yards per game to this point (sixth in the NFL). They should be able to shut down Peterson (especially knowing the Redskins can't throw the ball all that well).

When they do that, they shut down the offense. And that will equal a win.

Case Keenum

Can-Case-Keenum-bounce-back-as-the-Redskins_-starter-once-again

Speaking of the San Francisco passing defense, it's pretty ridiculous. So far, the 49ers are allowing just 150.2 passing yards per game. That's the best in the entire NFL.

Meanwhile, the Redskins quarterback situation is ugh. Case Keenum started the year as the starter and actually looked really solid through two weeks. Then he stumbled hard the next two and was benched. He returned as the starter against the Dolphins.

Against a team that was giving up over 40 points per game and about 300 passing yards, Keenum led Washington to 17 points. He did throw for two touchdowns and no interceptions but did so on 13-for-25 passing with just 166 yards.

One play, in particular, was very worrisome. Washington gave Keenum a clean pocket all game, however, he panicked a few times anyways. That included a play backed up deep in their own territory where Keenum scrambled out of a clean pocket, only to scramble back into it, then to scramble back out and was about 12 yards behind the line of scrimmage before throwing a pass right at a defender (luckily for the Redskins it was dropped).

Keenum won't get so lucky against San Francisco. If he continues to struggle, the 49ers will absolutely destroy him.

Running Game

Tevin Coleman

If we're being honest, the 49ers offense was not great against the Rams in Week 6.

Quarterback Jimmy Garoppolo hasn't been great most of the year and he had no touchdown passes but a fumble and interception against the Rams.

Meanwhile, the running attack has been great all year but had just 99 yards on 41 carries.

That being said, the Redskins aren't the Rams. Yes, their defense was supposed to be great, but they haven't shown it much.

Some of that can be put on the offense. The defense is on the field so much, they tend to get tired and give up points in bunches as the game goes on.

That could happen again very easily though. San Francisco's defense is likely going to get off the field very fast, making the Washington defense become overworked way too fast.

Once that happens, the 49ers can run it down their throats. And they have three running backs who have been awesome this season in Tevin Coleman, Matt Breida and Raheem Mostert.

With a three-headed monster, San Francisco can continuously sub them out and keep them all fresh. This will give them a huge advantage over a tiring Washington defense.

Yes, the Redskins have a superb defensive line but tire them out enough (it's a little tougher because Tim Settle is a fantastic substitute) and you can run for days.

George Kittle

George Kittle

This one is really simple. The Redskins don't have someone that can cover tight end George Kittle regularly.

They'll likely try a bunch of different people, and that will lead to Kittle making a lot of defenders look bad.

One thing that's getting extremely frustrating as the season goes on is Washington's use of Montez Sweat. Far too often he's been seen in coverage. That's not his game by any stretch of the imagination and it tends to end in the person he's covering getting a reception.

If Kittle gets the fortune of having Sweat cover him, he could go off. Truthfully though, it won't matter.

Landon Collins isn't a “cover” safety and Monte Nicholson is better when he's roaming. Any cornerback will be out-muscled too.

Kittle is a serious matchup problem for any team but with Reuben Foster out for the Redskins (probably would've been their best bet) he's an elite matchup problem in Week 7.