On Monday, Matt Nagy was announced as the 16th head coach in Chicago Bears history. Nagy had previously worked as the offensive coordinator and quarterbacks coach for the Kansas City Chiefs under head coach Andy Reid, and before that was an assistant for Reid and the Philadelphia Eagles.

The announcement by the Bears makes Nagy the 10th former Reid assistant to become an NFL head coach. Reid worked under Mike Holmgren in Green Bay in the 1990’s, but in 1999, he was hired as the head coach in Philadelphia. When he became the man in charge of the Eagles, Reid began hiring assistants in all three phases of the game that he would groom into head coaches of their own. The strategy has worked; in 19 seasons as a head coach with Philadelphia and Kansas City, Reid has a regular season record of 183-120 while going to the playoffs in 13 of those years.

Here’s a closer look at the Reid coaching tree, and how his former assistants have fared as head coaches.

Brad Childress
Role under Reid: Eagles quarterbacks coach (1999-2001), Eagles offensive coordinator (2002-2005), Chiefs offensive coordinator (2016), Chiefs assistant head coach (2017).
Career as head coach: Minnesota Vikings (2006-2010) – 39-35 record, two playoff appearances.

John Harbaugh
Role under Reid: Eagles specials teams coordinator (1999-2006), Eagles defensive backs coach (2007).
Career as head coach: Baltimore Ravens (2008-Present) – 160-94 record, six playoff appearances, Super Bowl XLVII champion.

Ron Rivera
Role under Reid: Eagles linebackers coach (1999-2003).
Career as head coach: Carolina Panthers (2011-Present) – 64-47 record, four playoff appearances.

Steve Spagnuolo
Role under Reid: Eagles defensive assistant (1999-2000), Eagles defensive backs coach (2001-2003), Eagles linebackers coach (2004-2006).
Career as head coach: St. Louis Rams (2009-2011), New York Giants (2017, interim) – 11-41 record.

Leslie Frazier
Role under Reid: Eagles defensive backs coach (1999-2002).
Career as head coach: Minnesota Vikings (2010-2013) – 21-32 record, one playoff appearance.

Pat Shurmur
Role under Reid: Eagles tight ends and offensive line coach (1999-2001), Eagles quarterbacks coach (2002-2008).
Career as head coach: Cleveland Browns (2011-2012) – 10-23 record.

Todd Bowles
Role under Reid: Secondary coach and interim defensive coordinator (2012).
Career as head coach: New York Jets (2015-Present) – 22-29 record.

Doug Pederson
Role under Reid: Eagles quarterback (1999), Eagles offensive quality control coordinator (2011-2013), Eagles quarterbacks coach (2011-2013), Chiefs offensive coordinator (2013-2015).
Career as head coach: Eagles (2016-Present) – 20-21, one playoff appearance.

Sean McDermott
Role under Reid: Eagles scouting administrative coordinator (1999-2000), Eagles assistant to the head coach (2001), Eagles defensive assistant (2002-2003), Eagles assistant defensive backs coach (2004-2006), Eagles secondary coach (2007), Eagles linebackers coach (2008), Eagles defensive coordinator (2009-2010).
Career as head coach: Buffalo Bills (2017-Present) – 9-7 record, one playoff appearance.