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Ryan Nielsen

Ryan Nielsen

Assistant
Team: BUFType: DefensiveTenure: 1 year (2025-2026)

Coaching Timeline

Why does coaching matter?
CFB
Southern California
Volunteer Assistant
20021 yr
CFB
Ole Miss
Defensive Line
2005-073 yrs
CFB
Central Connecticut State
Defensive Coordinator
2008-092 yrs
CFB
Tennessee-Martin
Special Teams
20101 yr
CFB
Northern Illinois
Defensive Line
20111 yr
CFB
Northern Illinois
Co-Defensive Coordinator
20121 yr
CFB
NC State
Defensive Line
20131 yr
CFB
NC State
Def. Run Game Coordinator
2014-163 yrs
NO
New Orleans Saints
Defensive Line
2017-215 yrs
NO
New Orleans Saints
Defensive Coordinator
20221 yr
ATL
Atlanta Falcons
Defensive Coordinator
20231 yr
JAX
Jacksonville Jaguars
Defensive Coordinator
20241 yr
BUF
Buffalo Bills
Other Notable Asst.
20251 yr

Team Info

SeasonRoleTeamRecordHCOCDCQB1QB2RB1WR/TE 1WR/TE 2
2025Sr. Defensive AssistantBUFBUF12-5Sean McDermottJoe BradyBobby BabichJosh Allen(16.00)Mitchell Trubisky(2.00)James Cook(16.00)Khalil Shakir(14.75)Dalton Kincaid(10.75)
2024Defensive CoordinatorJAXJAX4-13Doug PedersonPress TaylorRyan NielsenTrevor Lawrence(9.50)Mac Jones(8.25)Tank Bigsby(13.75)Brian Thomas Jr.(16.75)Parker Washington(16.75)
2023Defensive Coordinator/DLATLATL7-10Arthur SmithDave RagoneRyan NielsenDesmond Ridder(13.25)Taylor Heinicke(4.50)Bijan Robinson(17.00)Drake London(15.75)Kyle Pitts(17.00)
2022Defensive CoordinatorNONO7-10Dennis AllenPete CarmichaelRyan NielsenAndy Dalton(14.00)Jameis Winston(3.00)Alvin Kamara(15.00)Chris Olave(14.75)Taysom Hill(15.25)
2021Other Notable Asst.NONO9-8Sean PaytonPete CarmichaelDennis AllenJameis Winston(6.50)Trevor Siemian(5.50)Alvin Kamara(13.00)Taysom Hill(10.75)Marquez Callaway(17.00)

Coach Impact

Note: only calculated for first year upon arrival — take results with a grain of salt.
NO
New Orleans Saints (2022)
Defensive Coordinator(Promoted — was Defensive Line here)
Promoted within team — delta reflects year-over-year change
Before (2021)First Year (2022)Delta
DEFENSE
RZ P/V4.3974.689▲ +0.232
3&Out%35.2%8332.6%62▼ -2.6%34
TO Rate2.3%731.2%6▼ -1.1%6
Penalty EPA13.81412.417▼ -1.458
Pass EPA-0.07791-0.077900.00048
Rush EPA-0.19097-0.06045▲ +0.1306
xRY Allowed4.38144.633▲ +0.2526
RYOE Allowed-0.94100-0.1783▲ +0.776
YAC OEX Allowed0.29740.2084▼ -0.1066
xYAC OEX Allowed-0.1175-0.1071▲ +0.0241
ATL
Atlanta Falcons (2023)
Defensive Coordinator/DL
Before (2022)First Year (2023)Delta
DEFENSE
RZ P/V5.4234.874▼ -0.687
3&Out%28.0%2534.9%80▲ +6.9%88
TO Rate1.5%191.5%190.0%49
Penalty EPA-2.4900.878▲ +3.235
Pass EPA0.131200.04451▼ -0.08778
Rush EPA-0.01320-0.18597▼ -0.17298
xRY Allowed4.21284.1832▼ -0.0364
RYOE Allowed0.3729-0.5197▼ -0.8894
YAC OEX Allowed0.32700.4356▲ +0.1142
xYAC OEX Allowed-0.16810.0147▲ +0.1820
JAX
Jacksonville Jaguars (2024)
Defensive Coordinator
Before (2023)First Year (2024)Delta
DEFENSE
RZ P/V5.0545.422▲ +0.426
3&Out%35.1%8220.9%1▼ -14.2%1
TO Rate2.3%720.7%1▼ -1.6%1
Penalty EPA-2.0886.150▲ +8.117
Pass EPA-0.021770.2114▲ +0.2321
Rush EPA-0.07251-0.03930▲ +0.03338
xRY Allowed3.67754.555▲ +0.8912
RYOE Allowed0.39290.0451▼ -0.3579
YAC OEX Allowed0.49450.4846▼ -0.0158
xYAC OEX Allowed0.22130.1916▼ -0.0350

Core Efficiency - Defensive

0255075100Percentile202220232024Def EPA — Ryan Nielsen-0.062NO-0.048ATL0.121JAX

Pass/Rush Splits - Defensive

YearRoleTeam% PassPass EPAPass Succ%Pass SOSxYAC OEXYAC OEX% RB RushRush EPARush Succ%Rush SOSxRYRYOE% QB RushQB Rush EPA
2024DCJAXJAX57.4%0.21147.6%-0.0100.190.4836.7%-0.03940.7%-0.0304.550.045.9%0.600
2023DCATLATL56.5%0.04440.8%-0.0270.010.4337.0%-0.18535.5%-0.0134.18-0.516.4%0.290
2022DCNONO55.8%-0.07740.1%0.003-0.100.2038.1%-0.06041.4%0.0154.63-0.176.1%0.205