Question: When was the American footballer born who broke record for rushing yards in a single season with 1,805 yards?

Context paragraphs:
1991 Indiana Hoosiers football team: The 1991 Indiana Hoosiers football team represented Indiana University in the 1991 NCAA Division I-A football season.  They participated as members of the Big Ten Conference.  The Hoosiers played their home games at Memorial Stadium in Bloomington, Indiana.  The team was coached by Bill Mallory, in his eighth year as head coach of the Hoosiers.  The Hoosiers participated in the Copper Bowl, a post-season matchup against Baylor.  The Hoosiers won, 24–0.  Vaughn Dunbar set the school record for rushing yards in a single season with 1,805 yards.  This record stood until 2014 when it was broken by Tevin Coleman with 2,036 yards.

All-purpose yardage: All-purpose yards or all-purpose yardage is an American football and Canadian football statistical measure.  It is virtually the same as the statistic that some football leagues refer to as combined net yards.  In the game of football, progress is measured by advancing the football towards the opposing team's goal line.  Progress can be made during play by the offensive team by advancing the ball from its point of progress at the start of play known as the line of scrimmage or by the defensive team after taking possession of the football via a change of possession (such as punt, kickoff, interception, punt block, blocked kick or fumble).  When the offensive team advances the ball by rushing the football, the player who carries the ball is given credit for the difference in progress measured in rushing yards.  When the offensive team advances the ball by pass reception, the player who catches the reception is given credit for the difference in progress measured in reception yards.  Although the ball may also be advanced by penalty, these yards are not considered all-purpose yards.  Progress lost via quarterback sacks is classified variously.  Thus, all-purpose yards is a combined total of rushing yards, receiving yards, and all forms of return yards only.  Some sources do not specify which types of return yards count toward this total because the most common forms of return yards are kick and punt return yards.

Yards from scrimmage: Yards from scrimmage is an American football and Canadian football statistical measure.  In the game of football, progress is measured by advancing the football towards the opposing team's goal line.  Progress can be made during play by the offensive team by advancing the ball from the point of progress at the start of play known as the line of scrimmage.  When the offensive team advances the ball by rushing the football, the player who carries the ball is given credit for the difference in progress measured in rushing yards.  When the offensive team advances the ball by pass reception, the player who catches the reception is given credit for the difference in progress measured in reception yards.  Although the ball may also be advanced by penalty these yards are not considered yards from scrimmage.  Progress lost via quarterback sacks are classified variously by league of play with rules having changed over time within some leagues.  The total of rushing yards and receiving yards is known as yards from scrimmage.  This definition of yardage differs from total offense which gives credit for passing yardage to the person throwing the football rather than receiving the football.

2,000-yard club: The 2,000-yard club is a group of seven National Football League (NFL) running backs that have rushed for 2,000 or more yards in a season.  These seven rushing seasons rank as the highest single-season rushing totals in NFL history, and reaching the 2,000-yard mark is considered a significant achievement for running backs.  No running back has yet achieved this feat twice.  The first 2,000-yard season was recorded in 1973 by Buffalo Bills running back O.J. Simpson.  He is the only player to have surpassed 2,000 yards in a 14-game season, as all others occurred in 16-game seasons; he finished the season with 2,003 rushing yards, averaging six yards per carry and an NFL-record 143.1 rushing yards per game.  Los Angeles Rams running back Eric Dickerson, who had broken the single-season rookie rushing record in 1983, recorded the second 2,000-yard season in 1984.  Dickerson rushed for 2,105 yards, the current NFL rushing record, and averaged 131.6 rushing yards per game.

Derrick Henry: Derrick Henry (born July 17, 1994) is an American football running back for the Tennessee Titans of the National Football League (NFL).  He played college football for the Alabama Crimson Tide, and was drafted in the second round of the 2016 NFL draft by the Titans.  In December 2015, he broke Herschel Walker's single season college rushing yards record in the SEC.  He won the 2015 Heisman Trophy, as well as the Doak Walker Award, the Maxwell Award, and the Walter Camp Award.  Henry also holds the national high school football record for career rushing yards.

Tevin Coleman: Tevin Ford Coleman (born April 16, 1993) is an American football running back for the Atlanta Falcons of the National Football League (NFL).  He was drafted by the Falcons in the third round of the 2015 NFL Draft.  He played college football at Indiana, where he was a unanimous All-American.

John Giannantonio: John Giannantonio (born 1934) is a former American football player who set several national high school football records, many which still stand.  As a 5 ft , 137 lb sophomore at the now-defunct Netcong High School in Netcong, New Jersey in 1950, Giannantonio rushed for 4,756 yards and 41 touchdowns over the team's eight-game season.  During a game in November that season against Mountain Lakes High School he rushed for 754 yards and nine touchdowns in a 61–0 win.  His 594.5 rushing yards per game average, season rushing yards total, and single-game rushing yards against Mountain Lakes remain national high school records as of 2017.

Kevin Richardson (American football): Kevin Lamont Richardson (born May 15, 1986) is an American former starting running back for the Appalachian State Mountaineers for the 2005-2007 seasons.  He holds school records for the most career rushing yards (4,804), the most rushing yards in a single season (1,676 in 2006), the highest career all-purpose yardage (6,104), and the most rushing touchdowns in a single season (30 in 2006).  Richardson was a key contributor to three seasons of unprecedented success for the Mountaineers.  He scored multiple touchdowns in all three of the team's FCS championship victories, and he rushed for 88 yards in the Mountaineers' 34-32 upset victory over the then #5 Michigan Wolverines of the Football Bowl Subdivision.

Fred Wendt: Fred Wendt (born c. 1927) was an American football player.  He played college football for the UTEP Miners football team.  He led the NCAA major colleges in rushing yardage with 1,570 rushing yards in 1948.  His total of 1,570 rushing yards in 1948 broke the national collegiate rushing record of 1,281 yards set by Rudy Mobley in 1942.  Wendt's rushing record stood for 20 years until broken in 1968 by O. J. Simpson.  Wendt also broke the NCAA single-season scoring record with 152 points in 10 games, including 32 place-kicking points.  He did not play during the 1949 season due to a leg injury and was signed by the Chicago Cardinals of the National Football League in April 1950.

Billy Marek: Billy Marek (born c. 1954) is a former American football running back.  He played college football for the University of Wisconsin–Madison from 1972 to 1975.  He gained more than 1,200 rushing yards for three consecutive years from 1973 to 1975.  He concluded his college football career with 740 yards and 13 touchdowns in the final three games of the 1974 season, including a Wisconsin Badgers football record 304 rushing yards against Minnesota.  He also set Wisconsin career records with 3,709 rushing yards and 277 points scored, led the country with 114 points in 1974, and was named the State of Wisconsin's "Sports Personality of the Year" in 1974.  He was inducted into the University of Wisconsin Hall of Fame in 1994.

Supporting paragraphs: 1991 Indiana Hoosiers football team Tevin Coleman
Answer: April 16, 1993