It's time to get serious about Fantasy Football. We're about halfway through the season, and at this point you have a pretty good idea of how amazing or awful your team is. In any case, there's still time to turn it around and make that late playoff push. To do that will require some excellent decision making, and that means starting the right players every Week. Let's take a look at which players should be in your starting lineups for week 7.

1. RB Dion Lewis

Mike Gillislee fumbled last week against the New York Jets, and you can bet that Dion Lewis will be seeing the field even more now.

He ran 11 times and scored a touchdown last week, and his volume of touches has grown in the past three weeks. It's always tough to trust a Patriots running back, but Lewis will be in a high scoring game and that makes him a top 20 running back in week 7.

2. WR Sammy Watkins

Yes, he's been terrible for the past three weeks, scoring just two fantasy points in three games. However, the Rams play the Cardinals, who have allowed the third most fantasy points to wide receivers this season. Because of that, Sammy Watkins becomes a flex starter in week 7.

3. Miami Dolphins D/ST

A defense playing the Jets? If you're streaming defenses, there really isn't a better option than Miami, as their defense has eight sacks over the past two weeks.

The Patriots have one of the worst defenses in the league, and even they managed to score six fantasy points. Expect a big fantasy game from the Dolphins defense.

4. QB Marcus Mariota

The Cleveland Browns have allowed the second highest number of points to opposing fantasy quarterbacks, and now it's Mariota's turn. The Titans quarterback has not scored more than 20 fantasy points in a week yet, but this is his best opportunity of the season.

If you have Mariota, get him into your starting lineup.

5. RB Adrian Peterson

All Peterson owners were hoping for positive developments in Arizona, and fantasy owners got much more than what they were expecting. Peterson was a workhorse, and ran 26 times for a whopping 134 yards and two touchdowns. Peterson has immediately become a top 10 running back thanks to the scenery change, and he's a top five running back in week 7 against a Rams defense that has allowed the highest number of fantasy points to opposing running backs.

6. TE George Kittle

Kittle made an appearance on the waiver wire list both this week and last week for good reasons. In week 7, Kittle is a borderline must-start fantasy player if you have a weak tight end. The new quarterback for the 49ers is quarterback C.J. Beathard, who played college football at Iowa. Who do you think he was throwing the ball to? The chemistry Beathard and Kittle developed at Iowa showed last week, and they'll have a full game together in week 7, which could lead to a big day.