John Harbaugh (born September 23, 1962) is the head coach of the Baltimore Ravens. Before his assignment with the Ravens, Harbaugh coached the defensive backs for the Philadelphia Eagles and served as the Eagles special teams coach for nine years. Harbaugh and his younger brother, San Francisco 49ers coach Jim Harbaugh, are the first pair of brothers to serve as head coaches in NFL history.

Harbaugh graduated from Pioneer High School in Ann Arbor, Michigan, during which time his father, Jack, was an assistant under Bo Schembechler at the nearby University of Michigan. He played collegiate football for Miami University, where he was a defensive back.

Harbaugh was first hired in the NFL in 1998 by Philadelphia Eagles then-head coach Ray Rhodes, and was one of four assistant coaches retained by new head coach Andy Reid in 1999. Prior to that, Harbaugh spent time in the college ranks as an assistant at Indiana University (1997), University of Cincinnati (1989–1996), Morehead State University (1988), and Western Michigan University (1984–1987).

David Michael Letterman (born April 12, 1947) is an American television host and comedian. He hosts the late night television talk show, Late Show with David Letterman, broadcast on CBS. Letterman has been a fixture on late night television since the 1982 debut of Late Night with David Letterman on NBC. Letterman recently surpassed friend and mentor Johnny Carson for having the longest late-night hosting career in the United States of America.

Letterman is also a television and film producer. His company Worldwide Pants produces his show as well as its network follow-up The Late Late Show with Craig Ferguson. Worldwide Pants has also produced several prime-time comedies, the most successful of which was Everybody Loves Raymond, currently in syndication.

In 1996, David Letterman was ranked #45 on TV Guide's 50 Greatest TV Stars of All Time.

Letterman was born in Indianapolis, Indiana. His father, Harry Joseph Letterman (April 1915 – February 1973), was a florist of British descent; his mother Dorothy Letterman (née Hofert, now Dorothy Mengering), a Presbyterian church secretary of German descent, is an occasional figure on the show, usually at holidays and birthdays.

Daniel Patrick Pugh (born May 15, 1956), professionally known as Dan Patrick, is an American Sports Emmy-winning sportscaster, radio personality, and actor from Mason, Ohio. He currently hosts The Dan Patrick Show which is broadcast on radio on Premiere Radio Networks, and on television on The Audience Network for DIRECTV subscribers, co-hosts NBC's Football Night in America, and serves as a senior writer for Sports Illustrated. He previously worked at ESPN for 18 years, where he often anchored the weeknight and Sunday 11 PM edition of SportsCenter.

Patrick attended the University of Dayton in Dayton, Ohio. His brother, Bill Pugh, is a longtime sports radio executive, and is currently the head of programming at Clear Channel San Diego. Patrick was a basketball player in high school at William Mason High School, becoming an Ohio all-state selection his senior year. He attended Eastern Kentucky University on a basketball scholarship for two years before transferring to the University of Dayton, where he majored in broadcast journalism. Patrick is also an alumnus of the Eta Hexaton Chapter of the Phi Sigma Kappa Fraternity at Dayton.

Jim Schwartz (born June 2, 1966) is an American football head coach for the Detroit Lions of the National Football League.

Born just outside Baltimore, Maryland, Schwartz attended Mount Saint Joseph High School, an all-male Catholic school, where he played football.

Schwartz was a four-year letterman at linebacker for the Hoyas of Georgetown University, where he earned his degree in economics. He received Distinguished Economics Graduate honors at Georgetown and earned numerous honors in 1988, including Division III CoSIDA/GTE Academic All-America, All-America, and team captain.

Schwartz got his start in the NFL doing research for Bill Belichick on the Cleveland Browns staff in the mid-1990s.

Schwartz served as the Tennessee Titans' defensive coordinator from 2001 until 2008, and was runner-up to Mike Nolan for the San Francisco 49ers' head coaching position in 2005. In January 2008, he interviewed for head coaching positions with the Washington Redskins, Miami Dolphins and Atlanta Falcons. Schwartz interviewed twice for the head coaching job with the Lions.Adam Schefter reported on January 15, 2009 that the Lions had decided to give the job to Schwartz.

James Joseph "Jim" Harbaugh (pronounced /ˈhɑrbɔː/; born December 23, 1963) is an American football coach and former player. He is currently the head coach for the San Francisco 49ers of the National Football League. Harbaugh agreed to a five-year deal with the San Francisco 49ers on January 7, 2011. Previously, he was the head coach at Stanford University for four seasons and the University of San Diego for three seasons. Harbaugh is also a former NFL quarterback who played for the Chicago Bears, Indianapolis Colts, Baltimore Ravens, and San Diego Chargers. He was selected by the Bears with the 26th pick in the first round of the 1987 NFL Draft. He played college football at Michigan. Harbaugh and his older brother, Baltimore Ravens coach John Harbaugh, are the first pair of brothers to serve as head coaches in NFL history.

Harbaugh's father was an assistant coach at Michigan under Bo Schembechler for seven seasons during the 1970s. Jim played for the junior league Ann Arbor Packers, then for Tappan Junior High, and attended Pioneer High School. When his father became defensive coordinator at Stanford for the 1980 season, Jim transferred to Palo Alto High School in California, where he graduated in 1982.