NFL depth charts are always in a constant state of flux due to transactions, injuries, performance and at-times questionable coaching decisions. The RB position in particular can be tough to stay on top of, as an overwhelming majority of offenses have replaced a single three-down back with committees of various shapes and sizes.

What follows is a more specific breakdown of each team's backfield in order to better determine:

Offenses that are featuring a single workhorse

Fantasy-friendly committee backfields

Situations that fantasy football owners should avoid

Teams that are most open for a rookie back to thrive in 2020

This isn't a full depth chart listing; I'm not concerned about special teams RBs or guys that might not even make the roster come September. Rather, the goal here is to get an early idea of the league's various committee situations in an effort to see both undervalued situations as well as teams that could theoretically enable a highly-productive rookie RB.

Thanks to Pro Football Reference for all snap and touch data.

Arizona Cardinals

Notes: Coach Kliff Kingsbury said he'd prefer to have *three* RBs to deploy during the regular season, but this *should* be Drake's backfield if the second half of last season was any indication of what is to come:

Week 9: 19 combined carries and targets, 84% snaps

Week 10: 17, 64%

Week 11: 23, 90%

Week 13: 18, 79%

Week 14: 14, 66%

Week 15: 23, 75%

Week 16: 28, 81%

Week 17: 16, 96%

Overall, Drake worked as the PPR RB4 during Weeks 9-17.

With that said: Edmonds was balling out himself during the first half of the season before battling a hamstring injury for basically the last eight games of the year. The disparity between their respective average draft position makes Edmonds a solid value as one of the league's more-underrated handcuff options.

Of course, the Cardinals aren't paying Drake $8.5 million to sit on the bench. His ceiling is as a true three-down back, and Kyler Murray's dynamic dual-threat ability already helped enable the Cardinals to great heights in the run game. Drake is worthy of an early-round selection in fantasy drafts of all shapes and sizes, but be wary of Kingsbury and company taking a back in the early rounds of the draft.

Historically most rookie RBs drafted outside of the top-three rounds don't go on to be relevant fantasy contributors.

Atlanta Falcons

Notes: The Falcons have been hesitant over the years to completely hand over the backfield to a single back. Sure, both Devonta Freeman and Tevin Coleman were given featured roles when the other was injured, but otherwise we've consistently seen multiple RBs involved in this offense.

Gurley will certainly be the lead back. Just don't underestimate Smith's involvement. The third-year back was the Falcons' most-efficient RB in both the run and pass game in 2019, ultimately playing at least 25% of the offense's snaps in all five of his non-injury shortened games.

Nobody threw the ball more than the Falcons in 2019. It's unlikely we see Gurley flirt with more than 15 or so rushes per week. Still, there's perhaps an underrated TD ceiling here considering Atlanta has posted average ranks of 5.6 and 12 in yards and scoring, respectively, over the past five seasons. Nobody has more rushing scores than Gurley since 2018, and he's entering arguably a better overall offense.

The Falcons are one of just seven teams with 150 or more unaccounted for carries from 2019 to 2020. Check out John Daigle's useful offseason tracker to stay on top of which teams offer the most available opportunity ahead of next season.

Baltimore Ravens

Notes: The Ravens kept all three of their RBs fairly involved last season:

Ingram: 15.4 combined carries and targets per game, 46% snap rate

Edwards: 8.8, 36%

Hill: 4.1, 17%

Intriguingly, Hill (50% snaps) worked ahead of both Ingram (30%) and Edwards (19%) when the Ravens were playing from behind during their AFC Divisional Round loss to the Titans. The rookie didn't get a single rush attempt, but Hill (5 targets) was used in the pass game more than Ingram (2) and Edwards (0) combined. Note that Ingram was playing through a calf injury that he suffered in Week 16.

Ultimately, I'm hesitant in expecting much from Hill in 2020. An injury to Ingram would result in Edwards, not Hill, getting the majority of backfield's touches.

Ingram had at least 13 touches in all but two regular season games last season. He again carries a high floor as the lead back of one of the NFL's best offenses, but make no mistake about it: this is still the Lamar Jackson show.

Buffalo Bills

Notes: Frank Gore is gone, meaning Singletary's already-firm stranglehold on this backfield is even stronger. The rookie emerged as a reliable three-down back and played at least 65% of the offense's snaps in every game that he wasn't either injured in, or was just returning from a layoff. He worked as the PPR RB18 during Weeks 7-16.

There's just one problem: Josh Allen is one of the most-productive vultures in the league. Overall, only Todd Gurley (29), Derrick Henry (28), Aaron Jones (24), Christian McCaffrey (22), Alvin Kamara (19), Ezekiel Elliott (18) and Melvin Gordon (18) have more rushing scores than Allen (17) over the past two seasons. Allen and Gore combined for 29 rush attempts inside the 10-yard line last season; Singletary had three.

The Bills might not be done adding to this backfield considering Yeldon was a healthy scratch with both Singletary and Gore healthy in 2019. Still, Bills GM Brandon Beane said Singletary "definitely could" be "the workload guy."

These types of true No. 1 RBs are increasingly rare in today's NFL, making Singletary a potential breakout star in 2020 *if* he experiences even a little positive touchdown regression.

Carolina Panthers

Notes: CMC posted an out-of-this-world 93% snap rate in 2019 on his way to putting together one of the greatest fantasy seasons we've ever seen. Overall, only 2006 LaDainian Tomlinson (481.1) racked up more PPR in a single season than McCaffrey (471.2). The man averaged a full six (!!!) PPR more than the next highest-scoring skill-position player in 2019.

The receiving floor here is what makes McCaffrey's production so absurd. He has two seasons with at least 100 receptions; every other RB in NFL history has combined for three-such seasons. CMC finished 2019 with more PPR from receiving production than all but 12 other players.

It remains to be seen what new head coach Matt Rhule and OC Joe Brady will bring to the table. There's a chance that we see the offense's various talented WRs get more involved in a quick-hitting passing attack led by Teddy Bridgewater, but this expected scheme also sets up nicely for McCaffrey to once again see all the check-downs he can handle. He's again the no-doubt 1.01 fantasy selection.

I'm not buying a reality where McCaffrey gets hurt and Bonnafon inherits a three-down role. Curtis Samuel was getting true RB snaps down the stretch of last season and is capable of siphoning off (at least) a handful of carries per game. It seems likely that Carolina spends a draft pick on the backfield at one point or another.

Chicago Bears

Notes: New OC Bill Lazor regularly utilized committee backfields in previous stops with the Dolphins and Bengals. Don't expect this to change in Chicago.

Luckily, Montgomery and Cohen are different-enough "talents" that there should be enough touches to go around. The former RB didn't fulfill lofty expectations as a rookie, but his 267 touches wound up being good for the 12th-highest mark in the league. Montgomery did begin to come on strong towards the end of the season, averaging more than four yards per carry in four of his five final games after doing so just twice in Weeks 1-12 combined.

Meanwhile, Cohen set career-low marks in yards per carry (3.3) and yards per target (4.4) in 2019. This pass-game efficiency in particular was absolutely brutal. Only 2003 Az-Zahir Hakim averaged fewer yards per target in a single season since the metric began being tracked in 1992. And yet, Cohen joins Christian McCaffrey, Alvin Kamara and James White as the only RBs with at least 200 receptions over the past three seasons.

Montgomery has flashed three-down ability, although it's unlikely we see him completely take over this backfield anytime soon. The Bears insistence on paying tight ends instead of offensive linemen is troubling, and the switch to Nick Foles under center won't necessarily be better for the run game considering Foles' statue-esque nature.

15-plus touches per game is more than most RBs can attest to having, although Montgomery still isn't all that sexy at his current low-20 ADP as long as Cohen continues to soak up pretty much all of the backfield's pass-game usage.

Cincinnati Bengals

Notes: Mixon finished 2018 and 2019 as the PPR RB10 and RB13, respectively, despite splitting plenty of snaps with Gio and operating behind one of the league's worst offensive lines. The expected addition of Joe Burrow, combined with the return of 2019 first-round OT Jonah Williams, should help both Mixon's touchdown equity and efficiency.

The problem is that there isn't much reason to believe Bernard (40% snaps) will take a full backseat to Mixon (59%). There is a high floor either way; he was one of just nine RBs with at least 300 touches last season. Still, Mixon's current top-six ADP might be a bit too lofty considering his lack of a featured pass-game role. There's a good chance that this offensive line is again terrible in 2020.

Presently, I'd rather draft at least Christian McCaffrey, Saquon Barkley, Alvin Kamara, Ezekiel Elliott, Dalvin Cook and Derrick Henry before Mixon.

Cleveland Browns

Notes: The Browns have two of the league's most-talented RBs between Chubb and Hunt. The former RB is arguably the league's single-most beastly creator of yards after contact; the latter averaged a league-high 0.41 missed tackles per touch in 2019, led the league in broken tackles in 2017, and was second in 2018 before being suspended.

There's a real chance that the Browns embrace a two-RB heavy offense in 2020. Neither new head coach Kevin Stefanski nor OC Alex Van Pelt made a habit of utilizing two-RB formations with the Vikings or Bengals, respectively, but Hunt and Chubb complement each other's skill-sets enough to warrant the extra effort.

This is a fantastic real-life duo, but it remains to be seen whether or not Chubb and Hunt can co-exist as fantasy RB1s. Chubb still racked up at least 15 touches in all but one game with Hunt during Weeks 10-17, although the former back's already-pedestrian pass-game role shrunk even further. Both Chubb (PPR RB15) and Hunt (RB17) were more than viable fantasy starters during the second half of last season; just realize each has a somewhat limited ceiling in this crowded offense.

Of course, either Chubb or Hunt would offer potential league-winning upside if the other were forced to miss extended action.