Most likely, if you're playing in Week 15, you are playing in your fantasy semifinals. You've survived the regular season and you are now just trying to win. In Week 14, some of the previously elite quarterbacks had rough fantasy outings Patrick Mahomes and Russell Wilson, in particular, may have cost fantasy owners a much-needed win. Always keep an eye on their matchups as even the best quarterbacks can struggle.
START These Quarterbacks
Ryan Tannehill, Tennessee Titans vs. Houston Texans
Since Week 7, Tannehill has had either 300 yards or multiple touchdown passes in every game he's played. At first, it seemed that he was a matchup-based quarterback. However, he's proven that for some reason, this season he is playing better than he has in years. Tannehill faces the Texans this week, and they have allowed more than 300 yards and three touchdowns to quarterbacks in the past two weeks, including giving up big numbers to rookie Drew Lock. Start Tannehill as a QB1.
Baker Mayfield, Cleveland Browns at Arizona Cardinals
The Browns have a great Week 15 matchup against the Cardinals. While Mayfield has been hit or miss for most of the season, expect him to have a decent game this week. He's not QB1-worthy, but he is a solid QB2. With tight end David Njoku back, the pair should connect for at least one touchdown this week. To be fair, Mayfield should have had a good game in Week 14 as well, but he finished with less than 200 yards and two interceptions. He ran one in, but overall was disappointing, hence the QB2 rating for this week.
START This Tight End
Tyler Higbee, Los Angeles Rams at Dallas Cowboys
With Gerald Everett out over the past two weeks, Higbee has had 19 targets. He's caught 14 of them for 223 yards and a touchdown. Jared Goff looks for him often, and that should continue this week. It doesn't seem like Everett is ready to return, as he hasn't been able to practice. The Rams face the Cowboys, who allow the 10th-most points to tight ends. Higbee is a TE1 this week.
START This Defense/Special Teams (DST)
Kansas City vs. Denver Broncos
In the past three weeks, the Chiefs DST has put up double-digit fantasy points against opponents such as the Chargers, the Raiders and the Patriots. In Week 15, Kansas City hosts Denver. While the Broncos have been a solid team, they don't put up a lot of points and are usually a good matchup for opposing DSTs. Start the Chiefs this week as they may be able to make Drew Lock look like a rookie making just his third start.
SIT These Quarterbacks
Carson Wentz, Philadelphia Eagles at Washington Redskins
Wentz has looked good in the past two weeks, and he does have a good matchup. However, the problem is he has no more wide receivers. Wentz is going to have to rely on his tight ends, because the only healthy wide receiver is J.J. Arcega-Whiteside, and he is currently questionable with a hamstring injury. He should play, but he hasn't shown that he's a No. 1 receiver this year. Wentz is a QB2 because of matchup, but he needs to find some pass catchers not named Zach Ertz or Dallas Goedert.
Mitchell Trubisky, Chicago Bears at Green Bay Packers
In the past five games, Trubisky has three games with three touchdowns (and two games with one). He's found Anthony Miller and also has been able to connect with Allen Robinson frequently to ignite the Bears offense. However, in Week 15, Chicago's in Lambeau Field to face Packers. It's not a tough matchup on paper, but Green Bay always plays the Bears tough, and Tribusky had a rough outing against the Pack back in Week 1. Trubisky is going to be a low QB2.
SIT This Tight End
Vance McDonald, Pittsburgh Steelers vs. Buffalo Bills
Last week, McDonald was supposed to put up his best game of the season. He was facing the Cardinals, who allow the most fantasy points to tight ends. Instead, he finished with one reception for three yards. Granted, he was injured in the third quarter, but tight ends have done plenty of damage in a half against Arizona. It's not clear if McDonald will be cleared for Week 15, but even if he is, leave him on the bench.
SIT This Defense/Special Teams (DST)
Jacksonville Jaguars at Oakland Raiders
It seems that the Jags have given up in recent weeks. They head to the West Coast for this game, and the Raiders are likely going to try to go out on a high note (this will be the last game they play in Oakland). After putting up negative points in leagues that allow that in Week 14, the Jags are not a recommended DST. This hasn't been a solid DST since Week 8 and can safely be dropped.
— Written by Sarah Lewis, who is part of the Athlon Contributor Network and lives, eats, and breathes fantasy football. Have a fantasy football question? Send it to her on Twitter @Sarah_Lewis32.