Question: What position does Bob Diaco hold with the football team hat has the most wins and the highest winning percentage of any program over the last 50 years?

Context paragraphs:
Oklahoma Sooners football: The Oklahoma Sooners football program is a college football team that represents the University of Oklahoma (variously "Oklahoma" or "OU").  The team is currently a member of the Big 12 Conference, which is in Division I Football Bowl Subdivision (formerly Division I-A) of the National Collegiate Athletic Association (NCAA).  The program began in 1895 and is one of the most successful programs since World War II with the most wins (606) and the highest winning percentage (.762) since 1945.  The program has 7 national championships, 45 conference championships, 154 All-Americans (76 consensus), and five Heisman Trophy winners.  In addition, the school has had 23 members (five coaches and 18 players) inducted into the College Football Hall of Fame and holds the record for the longest winning streak in Division I history with 47 straight victories, a record that stands to this day.  Oklahoma is also the only program that has had four coaches with 100+ wins.  They became the sixth NCAA FBS team to win 850 games when they defeated the Kansas Jayhawks on November 22, 2014.  The Sooners play their home games at Gaylord Family Oklahoma Memorial Stadium in Norman, Oklahoma.  Lincoln Riley is currently the team's head coach.

Nebraska Cornhuskers football: The Nebraska Cornhuskers football team represents the University of Nebraska–Lincoln.  Among the 128 Division I-A teams, Nebraska is one of ten football programs to win 800 or more games.  Nebraska has more victories against Power Five opponents than any other program, as well as the third most victories all-time, behind only Michigan and Texas.  Nebraska also has the most wins and the highest winning percentage of any program over the last 50 years.  Two of Nebraska's national championship-winning teams, the 1971 and 1995 teams, are considered to be among the best college football has ever seen.

Rating percentage index: The rating percentage index, commonly known as the RPI, is a quantity used to rank sports teams based upon a team's wins and losses and its strength of schedule.  It is one of the sports rating systems by which NCAA basketball, baseball, softball, hockey, soccer, lacrosse, and volleyball teams are ranked.  This system has been in use in college basketball since 1981 to aid in the selecting and seeding of teams appearing in the men's playoffs (see March Madness), and for the women's tournament since its inception in 1982.  In its current formulation, the index comprises a team's winning percentage (25%), its opponents' winning percentage (50%), and the winning percentage of those opponents' opponents (25%).  The opponents' winning percentage and the winning percentage of those opponents' opponents both comprise the strength of schedule (SOS).  Thus, the SOS accounts for 75% of the RPI calculation and is 2/3 its opponents' winning percentage and 1/3 its opponents' opponents' winning percentages.

Civil Conflict: The Civil Conflict (sometimes styled as the conFLiCT), is the name given by former University of Connecticut football head coach Bob Diaco to Connecticut's annual matchup against the UCF Knights football team of the University of Central Florida.  The teams first met in 2013 as members of the American Athletic Conference (The American).  Diaco was fired at the end of the 2016 season, to be replaced by Randy Edsall.

Ted Kessinger: Ted Kessinger (born January 15, 1941) is a former American football coach.  He served as the head football coach at Bethany College in Lindsborg, Kansas from 1976 to 2003, compiling a record of 219–57–1 for a winning percentage of .  He is among the college football coaches with the most wins and the highest winning percentage.

Mount Union Purple Raiders football: The Mount Union Purple Raiders football program is the intercollegiate American football team for the University of Mount Union located in the U.S. state of Ohio.  They compete in the National Collegiate Athletic Association (NCAA) at the Division III level and are members of the Ohio Athletic Conference (OAC).  The team was established in 1893 and plays its home games at the 5,600 seat Mount Union Stadium.  They are coached by Vince Kehres.  Through the 2015 season, Mount Union football has won 12 Division III National Championships and 27 OAC titles, which includes a streak of 24 consecutive conference titles from 1992 through 2015.  Additionally, the Purple Raiders own the NCAA football record for consecutive victories with 55, set from 2000 to 2003, which broke their previous record of 54, set from 1996 to 1999.  The team has also had notable winning streaks of 110 consecutive wins in the regular season from 1994 to 2005 and 112 from 2005 to 2016, along with a 98-game winning streak at home that also ended in 2016.  With the Purple Raiders' success, former head coach Larry Kehres holds the record for highest winning percentage ( ) for coaches with minimum 200 career wins over his 27 seasons (1986–2012) as coach at Mount Union.

Bob Caruthers: Robert Lee Caruthers (January 5, 1864 – August 5, 1911), nicknamed "Parisian Bob", was an American right-handed pitcher and right fielder in Major League Baseball who played primarily for the St. Louis Browns and Brooklyn Bridegrooms.  The star pitcher on five league champions in a ten-year career, he was the top pitcher in the American Association, leading that league in wins and shutouts twice each, winning percentage three times, and earned run average once.  His 175 wins in the Association were the second most of any pitcher, and his league ERA of 2.62 was the lowest of any pitcher with at least 2,000 innings in the league; he was also the only pitcher to have 40-win seasons for two different Association teams.  His career winning percentage was the highest of any pitcher prior to 1950 with at least 250 decisions; some sources recognize him as having compiled the highest winning percentage of any pitcher with at least 200 decisions (and retired as of 2006) in major league history.

Bob Diaco: Robert Albert Diaco (born February 19, 1973) is an American football coach and former player.  He is currently the defensive coordinator at Nebraska.  He previously was the head coach of the Connecticut Huskies football team.  Prior to coaching at Connecticut, he has been a coach at Western Illinois, Eastern Michigan, Central Michigan, Virginia, Cincinnati, and Notre Dame.  He played college football at Iowa.

List of Purdue Boilermakers head football coaches: The Purdue Boilermakers football program is a college football team that represents Purdue University in the Big Ten Conference in the National Collegiate Athletic Association.  The team has had 34 head coaches since it started playing organized football in 1887 and has been known by the nickname "Boilermakers" since 1891.  Purdue is an original member of the Big Ten, joining in 1896 after spending six years in the Indiana Intercollegiate Athletic Association.  The Boilermakers have played in 1,117 games during their 122 seasons.  Four coaches have led the Boilermakers to postseason bowl games: Jack Mollenkopf, Jim Young, Leon Burtnett, and Joe Tiller.  Nine coaches have won conference championships with the Boilermakers: Snake Ames and D. M. Balliet in the Indiana Intercollegiate Athletic Association, and A. G. Scanlon, James Phelan, Noble Kizer, Elmer Burnham, Stu Holcomb, Mollenkopf and Tiller in the Big Ten.  No Purdue coach has led the Boilermakers to a national championship.  As of the end of the 2009 season, Tiller is the all-time leader in games coached (149) and wins (87), while Mollenkopf is the all-time leader years coached (14).  Ames leads the Boilermakers in winning percentage with a perfect 1.000 in his two seasons at Purdue.  Among coaches with more than two seasons of tenure, Kizer has the highest winning percentage, .750, and Fred Akers has the lowest winning percentage, with a record of 12-31-1 (.284) in four seasons.

List of Lindenwood Lions head football coaches: The Lindenwood Lions football program is a college football team that represents Lindenwood University.  The team has had 5 head coaches since organized football began in 1990.  The Lions have played in more than 300 games in its 25 seasons.  In those seasons, two coaches have led the Lions to postseason bowl games: Dan Kratzer and, Patrick Ross.  Ross is the only coach to have won a conference championship with the Lions, he has won three.  Ross, has also won a postseason game with the Lions.  Ross is the all-time leader in games coached and years coached, in wins, and winning percentage.  Jeff Driskill is, in terms of winning percentage, the least successful coach the Lions have had as he has a .177 winning percentage.

Supporting paragraphs: Bob Diaco Nebraska Cornhuskers football
Answer: defensive coordinator