2021 AFC Championship: Here's how Andy Reid's initial staff with 1999 Eagles is still impacting the NFL today - CBS Sports

Andy Reid faced a monumental task when he was named head coach of the Philadelphia Eagles in 1999, taking over a franchise that finished with a 3-13 record the previous season (the worst in the NFL) and a team that won just three of their last 19 games.

Reid is still a head coach -- of a different franchise in the Kansas City Chiefs -- and the seeds of his initial coaching staff on the 1999 Eagles are planted all over the Chiefs and the Buffalo Bills (coached by a Reid protege in Sean McDermott).

The 1999 Eagles weren't juggernauts -- finishing last in the NFC East at 5-11 -- but Reid's initial coaching staff is one of the most underrated in NFL history.

McDermott got his first coaching job in the NFL under Reid as a scouting coordinator at the age of 25, moving his way up the ranks to defensive coordinator of the Eagles in 2009 and 2010.

Reid fired McDermott, who then became a successful defensive coordinator under Ron Rivera (another member of the 1999 Eagles coaching staff) with the Carolina Panthers. .

Bieniemy retired after that season and moved his way up the coaching ranks as a running backs coach with the Minnesota Vikings and as the offensive coordinator for the University of Colorado before landing with Reid's initial staff with Kansas City in 2013. .

Spagnoulo earned his first professional head coaching job under Reid (intern for Washington in 1983), moving his way up the ranks as a protege for defensive coordinator Jim Johnson.

Only 11-41 as a head coach, Spagnuolo revamped his career with Reid as the Chiefs defensive coordinator the last two years -- winning a Super Bowl in 2019. 

An assistant head coach for the Minnesota Vikings under Brad Childress (who was on the 1999 Eagles coaching staff), Frazier was promoted to head coach in 2011 (was an interim head coach in 2010) and had a 21-32-1 record in four seasons. 

Rivera was hired by Reid as linebackers coach in 1999 after two seasons with the Chicago Bears as a defensive quality control coach

Pederson spent 14 seasons in the NFL before Reid brought him on his staff with the Eagles and made him his first offensive coordinator with the Chiefs. 

Childress served his first NFL job under Reid as the Eagles' quarterbacks coach before being promoted to offensive coordinator in 2001

He served as Eagles' quarterbacks coach for several years before becoming the head coach of the Cleveland Browns in 2011 (was also St. Louis Rams offensive coordinator for two years). 

Castillo has been with former Reid assistants in the NFL since as the Ravens offensive line coach under Harbaugh, Bills offensive line coach under McDermott and Bears offensive line coach under Matt Nagy.