What American football coach coached was the defensive coordinator for the Philadelphia Eagles and began his first year with the Detroit Lions in 2009?
Jim Schwartz
Jim Schwartz
James J. Schwartz (born June 2, 1966) is an American football coach who is the defensive coordinator of the Philadelphia Eagles of the National Football League (NFL).
 Schwartz was also formerly the head coach of the NFL's Detroit Lions.
2009 Detroit Lions season
The 2009 Detroit Lions season was the franchise’s eightieth season overall in the National Football League.
 It was the first season with the Lions for new head coach Jim Schwartz, and most of his new coaching staff.
 The Lions also introduced slightly new uniforms and logos.
 The Lions spent the whole season at the bottom of their division and finished at 2–14, the second-worst record during the 2009 season.
 "Pro Football Reference" has argued that, owing to a weaker programme featuring the NFC West and AFC North vis-à-vis their 2008 schedule against surprisingly strong NFC South and AFC South divisions, the 2009 Lions were actually a weaker team than the 0–16 2008 Lions.
Kevin Steele
Kevin Steele (born May 17, 1958) is an American football coach and former player.
 He is the current defensive coordinator for Auburn Tigers.
 Prior to that, he was the defensive coordinator at LSU and coached inside linebackers for the football team at Alabama.
 Previously, he was the defensive coordinator at Clemson University from 2009 until early 2012.
 From 1999 to 2002, Steele served as the head football coach at Baylor University, compiling a record of 9–36 overall and 1–31 in the Big 12 Conference. Lew Carpenter
Lewis Glen Carpenter (January 12, 1932 – November 14, 2010) was an American football player and coach.
 He played college football for the University of Arkansas and professionally for ten seasons in the National Football League (NFL) as a halfback and fullback with the Detroit Lions, Cleveland Browns, and Green Bay Packers.
 He played on three NFL Championship teams, with Detroit in 1953 and with Green Bay in 1961 and 1962.
 After his playing career ended, Carpenter spent 31 years as an assistant coach in the NFL with the Minnesota Vikings (1964–1966), Atlanta Falcons (1967–1968), Washington Redskins (1969), St. Louis Cardinals (1970–1972), Houston Oilers (1970–1974), Green Bay Packers (1975–1985), Detroit Lions (1987–1988), and Philadelphia Eagles (1990–1994).
 Carpenter also coached the Frankfurt Galaxy of the World League of American Football in 1996 and at Southwest Texas State University.
 He concluded his 47 years of playing and coaching football at the end of the 1996 season.
 Scientific tests on his brain diagnosed post-mortem that he had an advanced case of chronic traumatic encephalopathy (CTE). Dave Adolph
Dave Adolph (June 6, 1937 – February 12, 2017) was an American football coach.
 He served as defensive coordinator for the Cleveland Browns from 1986 to 1988.
 Prior to leaving the Browns in 1985 for the San Diego Chargers, he was the Browns' interim defensive coordinator in 1984.
 The promotion occurred after Marty Schottenheimer was elevated from the team's defensive coordinator position to head coach midway through the season.
 He joined Schottenheimer as his defensive coordinator for the Kansas City Chiefs from 1992 to 1994.
 Adolph was the defensive coordinator in four AFC championship games for three different NFL teams. Bill Sheridan
Bill Sheridan (born January 27, 1959) is an American football coach who is currently the linebackers coach for the Detroit Lions of the National Football League (NFL).
 Sheridan was previously the defensive coordinator for the Tampa Bay Buccaneers.
 He was also a coach for a number of college teams, including Notre Dame and Michigan State.
 From 2005 to 2008 he was the linebackers coach for the NFL's New York Giants.
 In 2009, he was the defensive coordinator for the New York Giants. Tommy Brasher
Tommy Brasher is an American football coach who currently serves as the Kansas City Chiefs' defensive line coach.
 He coached the Philadelphia Eagles line in 1985, then moved on to the Atlanta Falcons until 1989.
 After this he went to the Tampa Bay Buccaneers to coach for 1 year in 1990.
 He coached the Seattle Seahawks Defensive line from 1992-1998.
 Then he went back to the Philadelphia Eagles from 1999, until 2005, when he retired.
 In 2001, he was awarded the Eagles Ed Block Courage Award.
 He came out of retirement in 2012 to rejoin the Eagles after the firing of Jim Washburn to finish the season.
 After head coach Andy Reid was fired by the Eagles and hired by the Chiefs, Brasher was among the assistant coaches who followed Reid to Kansas City. Chuck Weber
Charles Frederick "Chuck" Weber, Jr. (born March 25, 1930) is a former American football linebacker in the National Football League.
 He played seven seasons for the Cleveland Browns (1955–1956), the Chicago Cardinals (1956–1958), and the Philadelphia Eagles (1959–1961).
 He was defensive coordinator of the Cincinnati Bengals from 1970 through 1974.
 Weber provided six interceptions for Philadelphia Eagles 1960 championship team.
 He grew up in suburban Philadelphia and went to Abington High School.
 After retirement, he worked as defensive coordinator for Cincinnati Bengals and Baltimore Colts, where he succeeded teammate Maxie Baughan.
 Weber resides in San Diego, California. Dick LeBeau
Charles Richard LeBeau ( ; born September 9, 1937) is an American football coach and former cornerback, who is the assistant head coach and defensive coordinator for the Tennessee Titans of the National Football League (NFL).
 He has been active at field level in the NFL for 58 consecutive seasons–14 as a player with the Detroit Lions and 44 as a coach.
 He is considered to be one of the greatest defensive coordinators of all time.
 Considered an “innovator” and “defensive football genius”, LeBeau created the "zone blitz" when he was defensive coordinator of the Cincinnati Bengals in the late 1980s. Defensive coordinator
A defensive coordinator is a member of the coaching staff of a gridiron football team who is in charge of the defense.
 Generally, along with the offensive coordinator, he represents the second level of command structure after the head coach.
 The defensive coordinator is generally in charge of managing all defensive players and assistant coaches, of developing a general defensive game plan, and of calling the plays for the defense during the game.
 At higher levels of football (college and professional), the defensive coordinator typically has a number of assistant coaches working under him who are responsible for the various defensive positions on the team (such as defensive line, linebackers, or defensive backs).
 You can look to the links under references for some of the best defensive coordinators in history according to Bleacher report.
 John Chavis (American football) and Jeremy Pruitt are among two of the great college defensive coordinators in recent history.
 There are Also many NFL greats that can be found in the references.
 People like Wade Phillips and Vic Fangio are among the NFL greats at defensive coordinator.
 Determining how good a defensive coordinator is has to do with a number of things such as defensive statistics, the type of attitude their players took to the field and also what other coaches and players had to say about them.