David Jerome Johnson Sr. (born December 16, 1991) is an American football running back for the Arizona Cardinals of the National Football League (NFL). He was drafted by the Cardinals in the third round of the 2015 NFL Draft. He played college football at Northern Iowa. Johnson attended Clinton High School in Clinton, Iowa, where he was a three-sport star in football, track, and basketball. He played as a running back and defensive back for the River Kings high school football team. He set numerous school records including touchdowns in a season, career receptions, career receiving yards, career and single-season total offense and single game record for touchdowns. As a senior, Johnson led Clinton to an 11–1 record while accounting for a school-record 42 touchdowns. For his efforts, he was selected 2009 Outstanding Offensive Player for Clinton. In four seasons, Johnson compiled an impressive 4,682 rushing yards (on 5.4 YPC) and 49 rushing touchdowns to go along with 1,734 receiving yards and another 14 receiving touchdowns. Johnson took up kick returning as a senior, averaging 36.5 yards per attempt and returning one for a touchdown. He was invited to play at the 2010 Shrine Bowl All-Star Game, where he showed excellent vision and speed. Academically, Johnson maintained over a 3.0 GPA throughout high school.