The Buffalo Bills may have lost for the first in nearly two months, but quarterback Josh Allen continued to stake his claim as a leading candidate for the NFL's MVP award this season. The Bills' starter moved back atop ESPN's QBR metric for the season heading into Week 15 by once again putting together one of the league's most efficient performances last Sunday.

Allen overtook Arizona Cardinals quarterback Kyler Murray and remains ahead of Baltimore Ravens star Lamar Jackson, Cincinnati Bengals quarterback Joe Burrow, and Washington Commanders rookie Jayden Daniels. Allen threw for 342 yards and three touchdowns and ran for 82 yards three more touchdowns in the Bills' 44-42 loss to the Rams. He has 11 total touchdowns and just one interception over the past three games, part of a stretch that has Allen on pace to set a new career high in QBR if he closes the season strong.

Here's how every NFL quarterback ranks based on ESPN's QBR as the 2024 regular season reaches its final month:

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ESPN's QBR, explained

Every week, ESPN gives each quarterback a QBR for their latest performance. According to ESPN, the rating is intended to "incorporate all of a quarterback’s contributions to winning, including how he impacts the game on passes, rushes, turnovers and penalties."

QBR measures each play's degree of success and how much credit the quarterback deserves for the play. The statistic also takes into account the strength of opposing defenses faced. The final result is an efficiency rating as a number on a 0-to-100-point scale. The cumulative rating is averaged out on a per-play basis across the course of the season.

Ranking NFL quarterbacks by total QBR ahead of Week 15

Here's how every starting quarterback with at least 100 pass attempts this season stacks up before Week 15 of the NFL season, based on their 2024 QBR (listed from worst to first):

• 41, Deshaun Watson, Cleveland Browns (QBR: 22.9)

• 40, Mac Jones, Jacksonville Jaguars (29.3)

• 39, Cooper Rush, Dallas Cowboys (30.4)

• 38, Will Levis, Tennessee Titans (30.5)

• 37, Gardner Minshew, Las Vegas Raiders (37.9)

• 36, Aidan O'Connell, Las Vegas Raiders (40.2)

• 35, Jacoby Brissett, New England Patriots (43.4)

• 34, Caleb Williams, Chicago Bears (46.4)

• 33, Dak Prescott, Dallas Cowboys (47.1)

• 32, Daniel Jones, New York Giants (47.6)

• 31, Anthony Richardson, Indianapolis Colts (48.4)

• 30, Bryce Young, Carolina Panthers (50.9)

• 29, Aaron Rodgers, New York Jets (51.4)

• 28, Justin Fields, Pittsburgh Steelers (51.9)

• 27, Baker Mayfield, Tampa Bay Buccaneers (51.9)

• 26, C.J. Stroud, Houston Texans (53.0)

• 25, Andy Dalton, Carolina Panthers (53.4)

• 24, Geno Smith, Seattle Seahawks (53.7)

• 23, Mason Rudolph, Tennessee Titans (54.7)

• 22, Joe Flacco, Indianapolis Colts (55.8)

• 21, Kirk Cousins, Atlanta Falcons (56.2)

• 20, Bo Nix, Denver Broncos (56.2)

• 19, Justin Herbert, Los Angeles Chargers (57.0)

• 18, Russell Wilson, Pittsburgh Steelers (57.1)

• 17, Drake Maye, New England Patriots (58.6)

• 16, Trevor Lawrence, Jacksonville Jaguars (58.9)

• 15, Sam Darnold, Minnesota Vikings (59.0)

• 14, Tua Tagovailoa, Miami Dolphins (63.1)

• 13, Derek Carr, New Orleans Saints (63.2)

• 12, Jared Goff, Detroit Lions (63.6)

• 11, Jordan Love, Green Bay Packers (64.2)

• 10, Patrick Mahomes, Kansas City Chiefs (64.6)

• 9, Jalen Hurts, Philadelphia Eagles (65.2)

• 8, Matthew Stafford, Los Angeles Rams (65.6)

• 7, Jameis Winston, Cleveland Browns (66.0)

• 6, Brock Purdy, San Francisco 49ers (68.5)

• 5, Kyler Murray, Arizona Cardinals (71.6)

• 4, Jayden Daniels, Washington Commanders (72.6)

• 3, Lamar Jackson, Baltimore Ravens (73.8)

• 2, Joe Burrow, Cincinnati Bengals (74.1)

• 1, Josh Allen, Buffalo Bills (76.7)

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This article originally appeared on USA TODAY: NFL quarterback rankings entering Week 15: Who are QBR leaders?