We've crossed the halfway mark in the regular season for most Fantasy Football leagues, so it's officially crunch time.

As we get ready to make a push for the stretch run and with Bye Weeks in full gear, the waiver wire has never been more important in 2018.

If Nick Chubb is available in your league still, change that immediately. But considering he should've been scooped up in every league after Carlos Hyde was traded away from Cleveland Friday, we're more focused on guys who should be available and worth spending your free agent budget on.

Here are 15 guys worth targeting on the waiver wire:

1. Kenjon Barner, RB, NE

It appears Sony Michel has avoided serious injury, but he still will probably miss at least Week 8 and possibly longer. James White will see a larger role without Michel, but Barner suddenly goes from a guy not even worth sniffing at in Fantasy to a must-own. As soon as Michel left the game, Barner entered and tallied 10 rushes against the Bears defense. If you're desperate for a running back in Week 8, Barner might be a good add as he has a fantastic matchup against a Bills defense that just allowed 219 rushing yards to the Colts.

2. Chris Ivory, RB, BUF

LeSean McCoy was forced to leave the Week 7 contest with a concussion, opening the door for a decent game for Ivory (126 total yards on 19 touches). If McCoy continues to miss time, Ivory is the clear beneficiary, though it's not a great matchup in Week 8 against the Pats.

3. Danny Amendola, WR, MIA

It's been a while since Amendola was anything more than a tease in Fantasy Football, but the soon-to-be-33-year-old has had back-to-back good games while building a good rapport with Brock Osweiler. Amendola has hauled in 143 yards and a tuddie on 14 catches (18 targets) the last two weeks and while he is banged up, he practiced in a limited capacity Monday. If he can suit up Thursday, he should be the Dolphins' top target as both Kenny Stills and Albert Wilson are expected to miss that contest with their own injuries.

4. Raheem Mostert, RB, SF

Matt Breida and Alfred Morris owners must hate this guy, but Mostert has emerged from complete irrelevance to lead the Niners backfield the last two weeks. The 26-year-old has 23 touches the last two games while Morris has tallied just 9 touches (all in Week 7) and Breida has racked up 19 touches as he works through a bunch of injuries, including an ankle issue. It will be tough to predict how this situation will play out this week, but Mostert has been the only Niners back worth starting recently and this group of RBs now has the best matchup of the week against the woeful Cardinals defense. Mostert at least deserves to be owned, even if you're not comfortable starting him at the moment.

5/6. Jalen Richard/Doug Martin, RB, OAK

With Marshawn Lynch on IR, Richard and Martin should be owned in all formats just for the sheer possibility of a heavy workload. However, both are questionable Fantasy starts for Week 8 — even coming off a Bye. Richard should be the call in PPR leagues while Martin figures to eat up most of Lynch's carries. 

7. Tyrell Williams, WR, LAC

Williams is owned in hardly any league, but he's racked up 236 receiving yards and 3 TDs the last two weeks. He's not getting a heavy workload (only 8 targets in that span), but the Chargers love throwing deep to this guy and it's paid off in back-to-back weeks. Williams isn't close to being a safe bet as his value is completely contigent upon whether he catchs a deep bomb or not, but you could do a lot worse in your Fantasy lineups.

8. Martavis Bryant, WR, OAK

With Amari Cooper now in Dallas, somebody's gotta catch balls for Jon Gruden's Raiders. There's no guarantee that's Bryant, but he's slated to start Week 8 and he has the talent and resume to be at least a servicable Fantasy player the rest of the season.

9. Donte Moncrief, WR, JAC

The good: In 3 of the last 4 weeks, Moncrief has tallied at least 5 catches and 76 yards. The bad: In the other week during that stretch, he did not record a single catch on 3 targets. So there's clearly some risk here, especially considering the state of the Jags passing offense and QB situation. But Moncrief may be worth a pickup and start in Week 8 if you're desperate, as the Eagles have given up some of the most Fantasy points to opposing WRs. 

10. Kelvin Benjamin, WR, BUF

Benjamin was drafted in most leagues but was unable to post as many as 10 Fantasy points in even full-point PPR leagues until Week 7, and that was a modest 11-point total. Nobody blames you if you've given up on Benjamin, but he finally topped 3 catches and 50 yards in Week 7 and has a rapport with Derek Anderson from their time in Carolina. 

11. Trenton Cannon, RB, NYJ

Who? Cannon is owned in 0.0 percent of Fantasy leagues, which makes sense given he had a grand total of 2 Fantasy points entering Week 7. But when Bilal Powell left the game with a neck injury, it was Cannon that stepped up with 69 receiving yards on 4 catches while Isaiah Crowell still handled rushing duties. If Powell misses time in Week 8 or beyond (neck issues are no joke), Cannon is the main beneficiary in the passing game and should be rostered in all PPR leagues.

12. Chris Herndon, TE, NYJ

The Jets' fourth-round pick from this spring is another no-name in the Fantasy world, but that's quickly changing after back-to-back weeks with a TD. Herndon has clearly become the top tight end for fellow rookie Sam Darnold, seeing 7 targets last week and hauling in 4 of those catches for 42 yards. If you're desperate for a TE or you're in a dynasty league, target Herndon now. 

13. DeVante Parker, WR, MIA

Parker has been worth absolutely nothing in Fantasy this year, finding his way out of the lineup on a weekly basis. But he's worth a speculative add in case he's traded by next week — like he wants — and he also receives a boost for Week 8 by default, as the other Dolphins wideouts are all banged up and Parker essentially has to play.

14. Jakeem Grant, WR, MIA

Notice a trend here? We're all-in on South Beach receivers this week. Same logic applies because of injuries to Stills and Wilson, but obviously all of Parker, Grant and Amendola will not be worth a Fantasy start in Week 8. This is still Osweiler and the Dolphins we're talking about. But Grant is fun with his gamechanging speed and has at least contributed in every single week of the season so far even before he's become an increased part of the gameplan, so his floor isn't "0" like Parker's or some of the other WR options on the market.

15. Colts D/ST

We can't end this without a defense/special teams unit, right? The Colts gave up at least 31 points for 3 straight games from Week 4 through 6, but they absolutely dominated the Bills last week and now draw a Raiders team that just lost its two best offensive playmakers over the last 10 days. There is no better D/ST to stream out there than the Colts, and they're available in more than half of leagues.

Bonus: Rishard Matthews, WR, NYJ

Matthews is reportedly signing with the Jets, who need some WR help. Matthews quit on the Titans earlier this season after they completely went away from him in the gameplan, but this is a guy that racked up 1,740 yards and 13 TDs from 2016-17. He's worth an add in all leagues just for the potential.

Former Bears head coach Dave Wannstedt joins Luke Stuckmeyer and Bears insider JJ Stankevitz from the golf course in sunny Florida to shed light on his recent conversation with new Bears defensive coordinator Chuck Pagano (1:30), Ed Reed's Hall of Fame belief in Eddie Jackson (3:00), whether he'd prioritize Bryce Callahan or Adrian Amos in Free Agency (6:15).

Plus how he'd handle the Cody Parkey situation, since he had a similar experience with Jim Harbaugh when he was coaching the Bears (9:30).

Listen to the entire podcast here or in the embedded player below.

Under Center Podcast

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2018 depth chart

1. Akiem Hicks
Usage: 16 games, 74.1 percent of defensive snaps
2019 status: $10.1 million cap hit

Hicks is one of the very best interior defensive linemen in the NFL, leading all players at his position with 34 run stops (defined by Pro Football Focus as tackles that constitute a loss for the offense) while contributing eight sacks and 53 pressures. He finally earned the Pro Bowl bid he’s deserved for years and will remain an anchor of the Bears’ defense as it transitions from Vic Fangio to Chuck Pagano. That he played nearly three-quarters of the Bears' defensive snaps, too, is a testmant to A) how tough is was to take him off the field and B) how well he conditioned himself to be able to play that much. 

2. Eddie Goldman
Usage: 16 games, 52.5 percent of defensive snaps
2019 status: $7.55 million cap hit

With so much star power highlight reel appearances surrounding him, Goldman perhaps was under-appreciated outside the walls of Halas Hall. But inside the Bears’ facility, Goldman’s impact was celebrated. His ability to absorb interior double teams allowed inside linebackers Danny Trevathan and Roquan Smith to shoot gaps and each rack up over 100 tackles, and coupled with Hicks few teams were able to effectively run the ball on the Bears. 

While Goldman indeed only played a little over half of the Bears’ defensive snaps, that was possible because of good depth behind him. Defensive line coach Jay Rodgers — the lone position coach holdover from Fangio’s staff — crafted a plan that allowed Goldman to stay healthy, fresh and effective all season. With Pagano keeping the Bears’ 3-4 base scheme, Goldman will still have a highly important role a year after signing a four-year, $42.04 million contract with $25 million guaranteed. 

3. Roy Robertson-Harris
Usage: 16 games, 33.6 percent of defensive snaps, 27.1 percent of special teams snaps
2019 status: Exclusive rights free agent

Robertson-Harris’ 28 pressures tied for fourth on the team behind the three guys you’d expect to be ahead of him (Khalil Mack, Hicks, Leonard Floyd). He was a disruptive presence able to play just about every defensive line technique, and he used his 6-foot-7 length to bat down two passes, too. 

Robertson-Harris will turn 26 in late July and could still have some untapped potential as a defensive lineman, a position he switched to only a few years ago. 

4. Bilal Nichols
Usage: 14 games, 31.2 percent of defensive snaps, 5.2 percent of special teams snaps
2019 status: $644,870 cap hit

Nichols came up with one of the biggest plays in the early part of the Bears’ season when he dropped Cardinals running back for a three-yard loss on third-and-two just after the two-minute warning, with Arizona driving in Bears territory. From there, Nichols was good for a few plays per game, immediately fitting in as an adept rotational player a few months removed from being a fifth-round pick.

Nichols tied with Robertson-Harris for fifth on the team with four sacks, and in Week 17 he thoroughly terrorized Minnesota’s offensive line: Four hurries, two hits and one sack (after the sack, he mimicked the “Viking Clap” to a largely empty U.S. Bank Stadium). Ryan Pace appears to have unearthed a solid contributor in Nichols, someone who will be a key part of the team’s defensive line rotation again in 2019. 

5. Jonathan Bullard
Usage: 16 games, 28.3 percent of defensive snaps, 15.1 percent of special teams snaps
2019 status: $1,026,630 cap hit

Bullard hasn’t quite capitalized on the potential that led Pace to draft him in the third round back in 2016, and was passed on the depth chart by Robertson-Harris and Nichols last season. He’s adequate against the run and his cap hit is low enough for him to stick on the roster in 2019. 

6. Nick Williams 
Usage: 2 games, 4.2 percent of defensive snaps
2019 status: Unrestricted free agent

Williams won a camp battle to secure a roster spot, but only appeared in two games (Week 1 and Week 9). 

7. Abdullah Anderson
Usage: Practice squad
2019 status: Reserve/future contract

The Bucknell alum and 2017 Patriot League defensive player of the year hung around the practice squad in 2018, and will get a shot at sticking in that role in 2019. 

Level of need (1-11, with 11 being the highest): 3

Between Hicks, Goldman, Robertson-Harris and Nichols, the Bears have four strong contributors to their defensive line rotation. Add Bullard in there and the “need” lessens, though defensive line is one of those positions where you can never have too many bodies. 

Previous grades and needs: QBs | RBs | WRs | TEs | OL