Rich Gannon has the best completion percentage by a quarterback in a game with 30+ completions, at 89.5 percent versus the Broncos on November 11, 2002.

highest completion percentage by quarterback with at least 30 completions in a game
Interpreted as:
highest completion percentage by quarterback with at least 30 completions in a regular-season game
11/11/2002Gannon12/18/2016Prescott9/13/2020Wilson10/23/2011Brees9/23/2013Manning12/27/2009Brees10/26/2014Brady11/25/2007Palmer11/24/2016Bradford10/13/2019Ryan9/29/2013Rivers9/13/2015Rivers11/10/2013Brees10/25/2015Cousins9/9/2018Brees11/1/2015Ryan10/21/2007Garcia9/30/2007Pennington10/29/2006Manning12/13/2020Herbert12/10/2017Stafford10/11/2009Manning12/17/2000Garcia89.588.988.688.686.586.585.784.283.883.383.382.982.982.582.282.282.282.182.181.881.881.881.8
NAMEDATETMOPPPCTCMPATTYDSAVGTDTD%INTINT%SCKSCKYRATE
Rich GannonRich Gannon11/11/2002OAKOAK@ DEN
@
89.534383529.337.900.015131.6
Dak PrescottDak Prescott12/18/2016DALDALvs. TB
vs.
88.932362797.800.000.031599.0
Russell WilsonRussell Wilson9/13/2020SEASEA@ ATL
@
88.631353229.2411.400.0323143.1
Drew BreesDrew Brees10/23/2011NONOvs. IND
vs.
88.631353259.3514.300.024144.9
Peyton ManningPeyton Manning9/23/2013DENDENvs. OAK
vs.
86.5323737410.138.100.012135.8
Drew BreesDrew Brees12/27/2009NONOvs. TB
vs.
86.532372587.012.700.019104.7
Tom BradyTom Brady10/26/2014NENEvs. CHI
vs.
85.7303535410.1514.300.000148.4
Carson PalmerCarson Palmer11/25/2007CINCINvs. TEN
vs.
84.232382837.437.912.615113.0
Sam BradfordSam Bradford11/24/2016MINMIN@ DET
@
83.831372246.100.012.70080.6
Matt RyanMatt Ryan10/13/2019ATLATL@ ARI
@
83.330363569.9411.100.0215144.9
Philip RiversPhilip Rivers9/29/2013SDSDvs. DAL
vs.
83.335424019.537.112.417120.3
Philip RiversPhilip Rivers9/13/2015SDSDvs. DET
vs.
82.934414039.824.924.9216103.6
Drew BreesDrew Brees11/10/2013NONOvs. DAL
vs.
82.934413929.649.800.019139.0
Kirk CousinsKirk Cousins10/25/2015WASWASvs. TB
vs.
82.533403177.937.500.0112124.7
Drew BreesDrew Brees9/9/2018NONOvs. TB
vs.
82.237454399.836.700.017129.5
Matt RyanMatt Ryan11/1/2015ATLATLvs. TB
vs.
82.237453978.824.412.212109.0
Jeff GarciaJeff Garcia10/21/2007TBTB@ DET
@
82.237453167.024.400.0318110.7
Chad PenningtonChad Pennington9/30/2007NYJNYJ@ BUF
@
82.132392917.512.625.11484.9
Peyton ManningPeyton Manning10/29/2006INDIND@ DEN
@
82.132393458.837.700.000129.2
Justin HerbertJustin Herbert12/13/2020LACLACvs. ATL
vs.
81.836442435.524.512.31395.4
Matthew StaffordMatthew Stafford12/10/2017DETDET@ TB
@
81.836443818.712.324.50091.4
Peyton ManningPeyton Manning10/11/2009INDIND@ TEN
@
81.836443097.036.812.300109.2
Jeff GarciaJeff Garcia12/17/2000SFSFvs. CHI
vs.
81.836444029.124.500.0423119.9
Ben RoethlisbergerBen Roethlisberger10/26/2014PITPITvs. IND
vs.
81.6404952210.7612.200.000150.6
Josh AllenJosh Allen11/8/2020BUFBUFvs. SEA
vs.
81.6313841510.937.900.0729138.5
Results may be incomplete. StatMuse has complete game-level data for completion percentage and completions going back to the 1950 season.

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