You have to wonder what's happening in Oakland. Khalil Mack has been a dominating force this year after being traded to the Bears, and now Amari Cooper, who looked like a shell of his former self in Oakland, has resurrected his career in Dallas.

Week 14 was second monster fantasy effort in the last three games. He's pretty much the only receiver worth investing in for the Cowboys and he'll once again be a target for fantasy owners. For the rest of the start/sits, here's the week 15 fantasy football start 'em, sit 'em guide for wide receivers.

Start

Stefon Diggs vs. Miami Dolphins

Kirk Cousins has been terrible in recent weeks.

So it's difficult to trust his ability to make any wide receiver worthwhile at this point. However, the NFL is a week-to-week league for a reason and Cousins is a much different quarterback at home. That means Diggs should be able to generate some fantasy points in week 15.

After scoring in three consecutive games, Diggs has been limited to just 12 combined targets in the last two games and his quarterback has been a mess. When Cousins is on, though, he's able to offer multiple scoring opportunities for wide receivers.

The Dolphins are allowing the fourth-most fantasy points per game to wide receivers in the last four weeks. Trust Diggs and the Vikings to get back on point.

Tyler Boyd vs. Oakland Raiders

Jeff Driskel is atrocious. But Boyd is still the No. 1 option for a Bengals team that is squaring off against an Oakland defense that is among the worst in the NFL.

The Raiders allow 8.4 yards per pass attempt, by far the worst mark in the NFL. And this matchup screams for a letdown by the Raiders. Oakland is traveling east for an early afternoon window in a meaningless game.

That likely means the defense will not be ready to play, giving Boyd several opportunities at generating a decent amount of targets.

He has at least eight targets in three of the last four games. So despite Driskel's inability to play quarterback, Boyd should get a start in week 15.

Curtis Samuel vs. New Orleans Saints

Samuel is becoming a favored target by Cam Newton. That should give fantasy owners enough confidence to give Samuel a chance as a WR2 in week 15.

Samuel has been targeted at least seven times in three of the last four games, notching near double-digit fantasy points in the last four games.

He's a solid target in the red zone for the Panthers, so he offers upside in multiple facets for fantasy owners. The Saints are still allowing plenty of yards per pass attempt, which should be a boon for Samuel in terms of targets and yardage.

Sit

Jarvis Landry vs. Denver Broncos

I'm selling my Cleveland stock this week.

The Broncos aren't great against the pass, but they'll be good enough at home in this one to stymie Landry. Landry has five or fewer targets in three of the last four weeks. Baker Mayfield has had a much better rookie season than I anticipated, but he doesn't lean on Landry as a main option.

Mayfield hasn't been a top-tier quarterback on the road this season, meaning this is not the right matchup to trust Landry in the fantasy playoffs.

Kenny Golladay vs. Buffalo Bills

Back-to-back road games on opposite sides of the country doesn't seem like a recipe for success for an offense struggling to find an identity.

That's why I'm not siding with anyone on the Lions this week.

Detroit was terrible in week 14 on the road against Arizona, so there shouldn't be any reason to trust the Lions this week. The Bills are one of the best defenses in the NFL against the pass and Golladay's usage has disappeared in recent weeks.

Don't give Golladay and Matthew Stafford an opportunity at scoring in week 15 in fantasy football.

Calvin Ridley vs. Arizona Cardinals

There's no reason to start Ridley in week 15.

Could he have a big game? Sure, he's shown that ability in the past. However, he's too inconsistent in fantasy scoring to trust in the fantasy football playoffs.

He has five or fewer targets in four of the last five games and he has eclipsed 40 yards receiving only once in the last five games. That's a major issue.

And while Arizona's offense is the worst int he NFL, the defense isn't completely terrible. The Cardinals are actually a top-10 defense in fantasy points allowed to wide receivers. Keep that in mind when deciding whether to start or sit Ridley in week 15.

Scott Levine blogs about fantasy sports and handicaps games. His Against The Chalk blog has earned him back-to-back Iowa Newspaper Association awards for Best Blog. Check out more fantasy football coverage at Against The Chalk.  

Scott Levine can be reached at scottlevine@clintonherald.com or on Twitter @ScottLevineCH