From Wikipedia:
Todd Robert Bowles (born November 18, 1963) is an American football head coach for the New York Jets of the National Football League (NFL). He played eight seasons in the NFL as a safety, mainly for the Washington Redskins, and started in Super Bowl XXII.
Bowles attended Elizabeth High School in Elizabeth, New Jersey.[2] He played college football for Temple University.
After retiring as a player, Bowles was a member of the Green Bay Packers' player personnel staff from 1995–1996. He was the defensive coordinator and secondary coach at Morehouse College in 1997, and the defensive coordinator and defensive backs coach at Grambling State from 1998–1999. He was the defensive backs coach for the New York Jets in 2000, Cleveland Browns in 2004, and Dallas Cowboys from 2005–2007. He was the Browns' defensive nickel package coach from 2001–2003.
Bowles was hired by the Miami Dolphins as the team's secondary coach and assistant head coach on January 23, 2008. After nearly four seasons as the secondary coach and assistant head coach, he was named the interim head coach on December 12, 2011, following the firing of head coach Tony Sparano. Bowles' first game as interim head coach of the Dolphins came on December 18, on the road against the Buffalo Bills. The Dolphins won the game 30-23. The Dolphins finished 2–1 under Bowles in 2011.
Also from Wikipedia:
Rex Ashley Ryan[2] (born December 13, 1962) is the head coach of the Buffalo Bills in the National Football League (NFL). After serving as an assistant coach for 22 years, Ryan attained his first head coaching job in the NFL with the New York Jets in 2009. He is the son of former Philadelphia Eagles and Arizona Cardinals head coach Buddy Ryan and is the fraternal twin brother of Rob Ryan, current defensive coordinator for the New Orleans Saints.
From a young age, Ryan aspired to follow in his father's footsteps and become a professional football coach. After spending the majority of his youth in Canada, Ryan returned to the United States as a teenager where he attended college at Southwestern Oklahoma State University. Upon graduating Ryan spent the next 22 years serving as an assistant coach on different teams at both the college and professional level. At the behest of their head coach Brian Billick, Ryan joined the Baltimore Ravens in 1999 and spent nine years there. In 2005 he became the defensive coordinator, and in 2008 the assistant head coach.
So, Bowles was an 8-year pro, while Ryan never met a donut he didn't like.
Will that matter to the players?
It can't hurt....