Fantasy Football waiver wire adds and drops after wild Week 4

We're now past the first month of the 2015 NFL season, and that means your fantasy league is likely 1/3 of the way completed.

A slow start doesn't have to mean the end of your season, but now is the time to make key additions and subtractions to ensure you stay afloat the rest of the way. Here's a look at this week's waiver wire adds and drops.

Add

Rams RB Todd Gurley
There's a reason why St. Louis spent the 10th pick in this year's NFL draft on Georgia star Todd Gurley. He would have been easily the best running back prospect since Adrian Peterson had he not been coming off an ACL tear, and even that wasn't enough to keep the Rams from spending a top-10 pick on Gurley.

That did keep them, however, from letting Gurley loose until they felt he was fully recovered from his injury. After getting nine yards on six carries against the Steelers in Week 3, Gurley erupted for 146 yards on 19 carries against the Cardinals in Week 4. That came at Arizona against what was the No. 4 rushing defense coming into Week 4, but Gurley shredded them with several big runs in the second half of the Rams' 24-22 win.

There's no question Gurley is the best back in St. Louis, and it looks like they've finally realized that. It's not often you can add a stud running back off the waiver wire, but that's what you'll be getting if Gurley is available in your league.

Ravens WR Kamar Aiken
The Ravens are badly hurting at wide receiver, figuratively and literally. Coming into the season, this was viewed as one of, if not the weakest position on the roster, and injuries have made sure that's the case now.

First-round receiver Breshad Perriman is out indefinitely after undergoing microscopic knee surgery, and Baltimore will be lucky to get anything out of him this year. Steve Smith Sr. is also now dealing with broken ribs and has been ruled out for Week 5 against Cleveland.

Oh, and Michael Campanaro is now out for the year with a back injury, and has been placed on Injured Reserve, leaving Kamar Aiken as the defacto No. 1 receiver for now. He was decent in that role with seven grabs for 77 yards and a score against Pittsburgh in Week 4. All of this has made Aiken a viable fantasy option for the time being.

Given Smith's age and potential wear and tear finally catching up to him, Aiken could very well end up being the No. 1 receiver for a good chunk of this season. Being able to add that kind of potential production on the waiver wire is something you can't miss out on.

Browns RB Duke Johnson
Cleveland appears to have found a gem in third-round rookie Duke Johnson. One of the most electric backs in college at Miami, Johnson showed what makes him such a dangerous player against the Chargers in Week 4, totaling 116 all-purpose yards, which included a 34-yard touchdown grab:

Duke Johnson's 1st career TD https://t.co/1RAm2umS4P

— Eric Elizondo (@EricElizondo8) October 4, 2015

Johnson now has 15 grabs for 117 yards over his last two games, making him a great PPR back. It's only a matter of time before he supplants Isaiah Crowell as the No. 1 back, so he may be worth picking up in even standard-scoring leagues now. As of Sunday, Johnson was owned in just 49-percent of CBS fantasy leagues, so go grab him now before it's too late.

Drop

Dolphins QB Ryan Tannehill
The Dolphins are a mess, and Ryan Tannehill is suffering the most as a result of it. His offensive line can't block. His running game is nonexistent. His only reliable receiver is Jarvis Landry. All of this helped translate to a 19-of-44 passing performance for 198 yards, two scores and two interceptions in a 27-14 loss to the Jets in Week 4.

Tannehill looks lost in what's now his fourth full NFL season, and he's guided his offense to just seven touchdowns in 16 quarters of play. He is the only offense Miami has, but he and his team is too big of a mess to have anything to do with it. There's also likely far more better QB options on your waiver wire, so dump Tannehill now.

Washington RB Matt Jones
After a breakout game against the Rams in Week 2, Matt Jones has rarely seen the field over the past two weeks. He's gained just 49 yards on 18 carries over the past two games and is losing snaps to Chris Thompson in passing situations with Alfred Morris being the No. 1 back. Morris is in a contract year, and it looks like Washington may want to get as much out of him as possible before letting him walk next offseason and letting Jones battle Thompson for carries.

Regardless of what happens, it's clear Jones isn't a big enough factor in the offense to warrant keeping him on your fantasy team. He'll have another big game or two this season, but there will be too many duds like these past two games to make him worth your roster outside of deeper leagues with 16+ teams.

Dolphins WR DeVante Parker
The Dolphins offense looked poised for a big year after several offensive additions that were highlighted by No. 14-overall pick DeVante Parker. He was among the best receiver prospects going into the draft and someone who looked like an instant-impact guy as a rookie.

However, surgery on his previously-broken foot over the summer cost him all of training camp and preseason. That put him behind the eight-ball, and he's never seemed to recover as Miami is relying more on Kenny Stills, Rishard Matthews, Greg Jennings and Landry. Parker has caught just four passes for 49 yards this year and didn't do anything in Miami's 27-14 loss to the Jets in Week 4.

Parker has a lot of talent and potential to be a fantasy stud, but it doesn't look like that will show itself this year as the Dolphins continue to spiral out of control.