The NFL is a passing league. If a team has a quarterback who can elevate those around him and an offensive line that can protect him, chances are they will be well-positioned to contend for the playoffs.
Though the elite quarterbacks in the league can fit the ball into tight windows on a consistent basis, the odds of success on that side of the ball are much higher when those signal-callers are paired with receivers who can defeat man coverage and get into open space.
Excelling at finding the soft spot in zone coverage is also important, while the top play-callers in the NFL frequently engineer space for their receivers.
Yet receivers who can win one-on-one are a tremendous help to quarterbacks, especially those who can defeat the blitz regularly with their ability to efficiently read the field and find the open man.
While determining the 'best' receiver in the NFL is a subjective process that can hinge on an affinity for certain styles of play, success in beating defenders in coverage can be quantified.
Stats Perform has done so with its open percentage metric, which tracks how often a receiver gets open when they're matched up against man coverage and have enough time to run a route. Plays that break down before a matchup with a defender can take place or scramble drills where a receiver uncovers after running his initial route are discounted.
So who are the best and worst in that regard? Here we look at the top performers, some surprise names uncovering more often than perhaps expected and those who rarely separate from defenders.
THE ELITE
A year in which Cooper Kupp leads the NFL with 1,141 receiving yards has seen him established as arguably the premier route runner in the NFL.
That is reflected by his open percentage of 57.75, which is the highest of any player with more than 10 coverage matchups.
Getting open on 41 of his 71 matchups, Kupp has consistently excelled at creating separation. His burn percentage, which measures how often a receiver wins his matchup with a defender when he's targeted, of 65.2 is above the average of 60.3 for wideouts (min. 10 targets), while he is fourth in the NFL in burn yards per route (4.2).
Joining Kupp near the top of the tree is Justin Jefferson of the Minnesota Vikings. Proving his record-breaking rookie year was no fluke, Jefferson has faced 108 coverage matchups and got open on 55 of them, good for an open percentage of 50.93.
Eleventh among receivers with a burn percentage of 73.4 and averaging 3.3 burn yards per route, there has been no sign of a sophomore slump from Jefferson, whose combination of separation ability and prowess at the catch point has turned him into one of the most dependable and dynamic receivers in the league.
Keenan Allen (53.16) is Kupp's closest challenger, the Los Angeles Chargers veteran underlining his status as one of the NFL's most underappreciated receivers by getting open at a rate that may only heighten frustrations around his team's underperforming offense.
Kansas City Chiefs star Tyreek Hill (47.78) boasts an elite open percentage that belies his underwhelming big play rate of 28.0 per cent, with Stefon Diggs' (47.62) success at getting open dispelling the notion of a drop-off from last year's receiving leader. Davante Adams (45.65) is unsurprisingly also among the league's best, yet he is accompanied by some eyebrow-raising names.
SURPRISE STUDS
It has been tough to watch an uninspired Pittsburgh Steelers offense this season and think anyone is getting open.
Almost every passing play the Steelers run seems to end in a contested catch, yet a wideout who thrives in those situations is also winning the vast majority of his coverage matchups.
Indeed, second-year wideout Chase Claypool ranks behind only Kupp and Allen in open percentage, uncovering from a defender on 35 of his 68 matchups (51.47).
However, a burn yards per route rate of 2.5, just above the average of 2.3, and his struggles in the burn yards per target metric (10.30) indicate that, while Claypool is separating from coverage, he is not putting significant distance between himself and defenders. He will likely need to continue relying on his superiority at the catch point.
As with the Steelers, you won't find too many people who draw a sense of excitement watching a Teddy Bridgewater-led Denver Broncos offense.
There is no doubting the talent on Denver's attack. With Jerry Jeudy hurt and Noah Fant so far failing to take the second-year leap many expected, Courtland Sutton has shone brightest and is on course for a 1,000-yard season, though Tim Patrick's impact has been comparable.
Save for Kendall Hinton (47.83 on 23 matchups), it is the relatively unheralded Patrick who has proven Denver's best at separating, his open percentage of 44.44 from 90 matchups level with Dallas Cowboys star Amari Cooper.
A below-average burn yards per route of 2.0 speaks to a paucity of substantial separation, but Patrick is using the distance he is able to put between himself and defenders to create explosive plays, his big-play rate of 36.7 per cent comfortably above the average of 29.2.
Again leading tight ends in receiving yards (747), most would expect Travis Kelce of the Chiefs to top the list at that position for open percentage. Instead, it is a former AFC West standout in ex-Charger Hunter Henry.
Scoring seven touchdowns in as many games prior to being kept out of the endzone in Thursday's win over the Atlanta Falcons, Henry possesses an open percentage of 48.15. However, he has not been double-teamed this season.
Darren Waller has a double-team percentage of 17.2 and has still managed to get open 46.75 per cent of the time. The attention the Las Vegas Raiders star draws and his ability to succeed despite it illustrate his position as one of the league's biggest matchup nightmares and arguably the gold standard at tight end.
NO ROOM FOR MANOEUVRE
The Packers' offense has stuttered by its own high standards in recent weeks, with their underwhelming numbers not just a product of Jordan Love's struggles against the Chiefs.
Since Week 6, the Packers are averaging 213.2 net passing yards per game – 20th in the NFL. For the season, they are 16th in yards per pass play (6.46).
That mediocrity can, in part, be attributed to a lack of receiving depth beyond Adams, and Marquez Valdes-Scantling's issues getting open encapsulate that problem.
Valdes-Scantling is supposed to be the Packers' deep threat who can stretch defenses with his ability to separate vertically.
Open on only five of his 38 coverage matchups – a percentage of 13.16 – Valdes-Scantling is not fulfilling his role. The Packers will likely need to be more explosive in the playoffs if they are to go all the way, meaning Valdes-Scantling must up his game.
Bryan Edwards is in a similar situation in Las Vegas. Scarcely utilised last season, Edwards has seen a bump in targets in 2021, the Raiders often going to him downfield.
Edwards' average depth of target is 17.2 yards, but he has found deep separation hard to come by, uncovering on 17 of his 111 matchups (15.32 per cent). Yet with a gaudy burn yards per target average of 15.01 and a big-play rate of 50.7 per cent that is third among receivers (min. 10 targets), Edwards is a player who takes full advantage of the little separation he gets when Derek Carr looks his way.
Edwards' former South Carolina team-mate San Francisco 49ers star Deebo Samuel is performing at the highest level of his young career. Samuel is second behind Kupp with 979 receiving yards and already has seven total touchdowns this season.
However, Samuel ranks near the bottom of the league in open percentage (15.07), with the difference between that number and his overall production a reflection of how he is used by San Francisco.
His average depth of target is 8.6 yards, below the NFL average for receivers of 11.0, speaking to the Niners' reliance on him on screens and short passes that are an extension of the run game.
Third in burn yards per route and leading all wide receivers with an average of 9.6 yards after catch per reception, Samuel takes advantage of those short targets with his speed, elusiveness and power, while he can win at the catch point downfield even without separation. The 49ers often get Samuel in space in the backfield but, for one of the league's most unique players, separation is not always a requirement.