Question: The Kaep in the nickname of what Maerican football quarterback?

Context paragraphs:
Otto Graham: Otto Everett Graham Jr. (December 6, 1921 – December 17, 2003) was an American football quarterback who played for the Cleveland Browns in the All-America Football Conference (AAFC) and National Football League (NFL).  Graham is regarded by critics as one of the most dominant players of his era, having taken the Browns to league championship games every year between 1946 and 1955, winning seven of them.  With Graham at quarterback, the Browns posted a record of 114 wins, 20 losses, and four ties, including a 9–3 win–loss record in the playoffs.  While most of Graham's statistical records have been surpassed in the modern era, he still holds the NFL record for career average yards gained per pass attempt, with 8.98.  He also holds the record for the highest career winning percentage for an NFL starting quarterback, at 0.814.  Long-time New York Yankees owner George Steinbrenner, a friend of Graham's, once called him "as great of a quarterback as there ever was."  He is also known for being one of only two people (the other being Gene Conley) to win championships in two of the four major North American sports—1946 NBL (became NBA) and AAFC championship, plus three more AAFC and three NFL championships.

Colin Kaepernick: Colin Rand Kaepernick ( ; born November 3, 1987) is an American football quarterback who is currently a free agent.  Kaepernick played college football at the University of Nevada, where he was named the Western Athletic Conference (WAC) Offensive Player of the Year twice and became the only player in NCAA Division I FBS history to amass 10,000 passing yards and 4,000 rushing yards in a career.  After graduating, he was selected by the San Francisco 49ers in the second round of the 2011 NFL Draft.

Michael Vick: Michael Dwayne Vick (born June 26, 1980) is a former American football quarterback who played 13 seasons in the National Football League, primarily with the Atlanta Falcons and the Philadelphia Eagles.  He played college football at Virginia Tech and was selected by the Falcons as the first overall pick in the 2001 NFL Draft.  During his six years with the Falcons, Vick was regarded as having transformed the quarterback position with his rushing abilities and was named to three Pro Bowls.  He holds the record for the most career rushing yards by a quarterback (6,109) and the most rushing yards by a quarterback in a season (1,039).

Clayton Thorson: Clayton James Thorson is an American football quarterback.  He is currently a redshirt junior and the starting quarterback for the 2017 Northwestern Wildcats football team.  After redshirting in 2014, he was named the starting quarterback in 2015 and led the Wildcats to the third 10-win season in program history.  As a starter for the 2016 team, he earned Academic All-Big Ten honors.  Thorson was selected by ESPN.com as the seventh best high school quarterback and played in the 2014 Semper Fidelis All-American Bowl.

Tyrod Taylor: Tyrod Di'allo Taylor (born August 3, 1989) is an American football quarterback for the Buffalo Bills of the National Football League (NFL).  He was the starting quarterback for the Virginia Tech Hokies football team from the start of the 2008 college football season through the 2011 Orange Bowl, the final game of the 2010 college football season for Virginia Tech.  He was drafted by the Baltimore Ravens in the sixth round of the 2011 NFL Draft and served as the backup to starting quarterback Joe Flacco, including during the Ravens' Super Bowl XLVII victory over the San Francisco 49ers.  Signed by Buffalo as a free agent in 2015, Taylor was named the starting quarterback for the Bills at the beginning of the 2015 NFL season.

David Walker (quarterback): David Walker (born December 24, 1955) is a former left-handed American football quarterback who played for Texas A&M University in the mid-1970s.  He was Louisiana's 1972 All-State Quarterback and the state's Outstanding Offensive Player while playing for Sulphur High School, where he was tagged with his nickname, "Moon."  Walker led Texas A&M to a 37-14 Sun Bowl victory over Florida to cap off the 1976 season and had the Aggies ranked #5 in the country after a 33-17 win over #7 Texas Tech in 1977.

Cooper Manning: Cooper Manning (born March 6, 1974) is the host for the show "The Manning Hour" for Fox Sports.  He is the oldest son of former professional football quarterback Archie Manning, and the older brother of former professional football quarterback Peyton Manning and current New York Giants quarterback Eli Manning.

Danny Etling: Daniel Patrick Etling (born July 22, 1994) is an American football quarterback for the LSU Tigers football team.  He arrived at LSU after transferring out of Purdue, where he was a true freshman for the 2013 team.  He is a right-handed quarterback known for his strong arm.  He was a 4-star high school prospect as a senior.  He served the first 4 games of the 2013 season as the backup quarterback for Purdue.  He was named Purdue's starting quarterback during their 5th game, started every game for the rest of the 2013 season.  Elting won the quarterback battle to be the 2014 starter as well, but was later replaced by Austin Appleby after 5 games.

System quarterback: A system quarterback is an American football quarterback who flourishes under a particular offensive system, specifically one that focuses on passing.  The term is often seen as a pejorative, for it implicitly downplays a quarterback's talent or skill by implying that a successful offense is due to a particular scheme or that a quarterback is successful due to his employment under specific circumstances.  A system quarterback is usually perceived as having their statistics inflated by a particular strategy.  Offensive schemes that tend to feature so-called system quarterbacks are the "run and shoot", spread, and, less frequently, spread option offenses.

Kaep (disambiguation): Kaep is a nickname for athlete Colin Kaepernick (although he prefers "Kap").  It may also refer to:

Supporting paragraphs: Kaep (disambiguation) Colin Kaepernick
Answer: Colin Kaepernick