Question: What is the birthdate of this American football coach and former player, serving as a coach for the Dallas Cowboys, whose role with the University of Tennessee was assumed by Jim Chaney, after his firing?

Context articles: Clint Dolezel
Jason Garrett
Jim Chaney
2012 Tennessee Volunteers football team
Ken Gray (American football)
Barry Switzer
Frank Pollack (American football)
Ken Norton Jr.
Derek Dooley (American football)
Butch Davis

Clint Dolezel (born March 25, 1970) is an American football coach and former professional arena football player in the Arena Football League (AFL).
 Dolezel was a quarterback in the AFL, and currently the head coach of the AFL's Philadelphia Soul.
 He played college football at East Texas State, and was in the AFL for 13 seasons from 1995 to 2008.
 Dolezel first became a head coach in 2010 with the San Angelo Stampede Express of the Indoor Football League (IFL).
 After just a single season, Dolezel returned to the AFL as the head coach of the Dallas Vigilantes.
 After the Vigilantes franchise suspended operations, Dolezel joined the Philadelphia Soul as their offensive coordinator under head coach Doug Plank.
 Plank left the Soul following the 2012 season, and the Soul promoted Dolezel to head coach.
 As an AFL player, he was originally signed by the Milwaukee Mustangs.
 In his career, he has also played for the Texas Terror/Houston Thunderbears, Grand Rapids Rampage, Las Vegas Gladiators, and the Dallas Desperados.
 Dolezel is also a scout for the Dallas Cowboys.
Jason Calvin Garrett (born March 28, 1966) is an American football head coach of the Dallas Cowboys of the National Football League (NFL).
 Garrett was the offensive coordinator and assistant head coach of the Cowboys before being promoted to interim head coach after the firing of Wade Phillips on November 8, 2010.
 He is a former professional American football quarterback in the National Football League for the Dallas Cowboys, New York Giants, Tampa Bay Buccaneers and Miami Dolphins.
 He played college football at Princeton University.
James Allen Chaney (born January 12, 1962) is an American college football coach and former player.
 Chaney currently serves as the offensive coordinator for the University of Georgia.
 Chaney previously served in the same capacity at the University of Arkansas from 2012 to 2014 and University of Tennessee from 2009 to 2012, assuming the role of interim head coach for the final game of the 2012 season after Derek Dooley was fired.
The 2012 Tennessee Volunteers football team represented the University of Tennessee in the 2012 NCAA Division I FBS football season.
 The Volunteers played their home games at Neyland Stadium in Knoxville, Tennessee and competed in the Eastern Division of the Southeastern Conference (SEC).
 The team was coached by Derek Dooley, who was in his third season with Tennessee.
 On November 18, 2012 Dooley was fired after 11 games following a 41–18 loss to in-state rival Vanderbilt.
 Dooley ended his three-year tenure at Tennessee with losing records of 16–21 overall and 5-19 in the SEC.
 Offensive coordinator Jim Chaney was named interim head coach for the final game of the season against Kentucky.
 The season was Tennessee's third consecutive losing season, a streak the program had not matched since 1909-1911.
Kenneth Don Gray (born March 10, 1936 in San Saba, Texas) was an offensive guard who played 13 seasons in the National Football League for the Chicago Cardinals/St. Louis Cardinals and the Houston Oilers.
 Gray attended and played football for four seasons at Howard Payne University.
 His first NFL contract, in 1958, paid him $6,000.00.
 In those days the league was composed of 12 teams, split into two divisions.
 After retiring as a player, earning six All-Pro awards, he served for three years as head coach at his high school alma mater, Llano High and offensive line coach for the 1977 AFC Champion Denver Bronco team that earned its way to Super Bowl XII, to play against the Dallas Cowboys.
 In 2016, he was inducted into the Texas Sports Hall of Fame along with former University of Texas head football coach Fred Akers, former Dallas Cowboys offensive lineman Larry Allen and former Major League Baseball pitcher Andy Pettitte.
 He earned a spot on the St. Louis Cardinals’ All-Time Team and the NFL All-1960s Team.
 A Christian, Gray first and foremost considers himself blessed with his lovely and gracious wife, Shirley, who has stood by him through all the years of risking injury in high school, college and league play, and the unique challenges of his coaching years to the present.
 They met and were wed back in their high school days at Llano High School.
 Their union produced two fine sons, Shane and Boyd and a grand child, Garret.
Barry Layne Switzer (born October 5, 1937) is a former American football player and coach.
 He served for 16 years as head football coach at the University of Oklahoma and four years as head coach for the Dallas Cowboys of the National Football League (NFL).
 He helped the Cowboys win Super Bowl XXX against the Pittsburgh Steelers.
 He has one of the highest winning percentages of any college football coach in history, and is one of only three head coaches to win both a college football national championship and a Super Bowl, the others being Jimmy Johnson and Pete Carroll.
Frank Pollack (born November 5, 1967) is an American football coach and former player who is the offensive line coach for the Dallas Cowboys of the National Football League (NFL).
 He was the former offensive line assistant coach for the Cowboys from 2013-2014.
 He was the former offensive linecoach for the Oakland Raiders.
 A former San Francisco 49ers offensive tackle and guard for seven seasons, he later served as the assistant offensive line coach for the Houston Texans.
Kenneth Howard Norton Jr. (born September 29, 1966) is an American football coach and former player who is currently the defensive coordinator for the Oakland Raiders of the National Football League (NFL).
 Norton played college football for the University of California, Los Angeles (UCLA), and received All-American honors.
 He was drafted in the second round of the 1987 NFL Draft, and played thirteen seasons for the NFL's Dallas Cowboys and San Francisco 49ers.
 He has previously served as the linebackers coach and the assistant head coach for the University of Southern California , then the linebackers coach for the Seattle Seahawks of the NFL.
Derek Dooley (born June 10, 1968) is an American football coach and former player.
 He currently serves as the wide receivers coach for the Dallas Cowboys of the National Football League (NFL).
Paul Hilton "Butch" Davis, Jr. (born November 17, 1951) is an American football coach.
 He is the head football coach at Florida International University.
 After graduating from the University of Arkansas, he became an assistant college football coach at Oklahoma State University and the University of Miami before becoming the defensive coordinator for the Dallas Cowboys of the National Football League (NFL).
 He was head coach of the University of Miami's Hurricanes football team from 1995 to 2000 and the NFL's Cleveland Browns from 2001 to 2004.
 Davis served as the head coach of the University of North Carolina at Chapel Hill (UNC) Tar Heels football team from 2007 until the summer of 2011, when a series of National Collegiate Athletic Association (NCAA) investigations resulted in his dismissal.
 He was hired by the NFL's Tampa Bay Buccaneers as an advisor in February 2012.