In 1988, Dickerson, with 1,659 yards rushing, became the first Colt to lead the league in rushing since Alan Ameche in 1955. This would mark the apogee of Dickerson's career with the Colts (although he would gain 1,311 yards rushing in 1989). Also, 1989 was the year that he passed the 10,000-yard mark, becoming the fastest player ever to do so (91 games), accomplishing the feat faster than greats like Jim Brown (98 games), Barry Sanders (103 games), Emmitt Smith (106 games), and LaDainian Tomlinson (106 games). By 1989, he had set a new NFL record with seven straight seasons of more than 1,000 yards rushing, and led the league for four of those seasons. With the retirement of Tony Dorsett at the end of 1988, he became the leader among active players in career rushing yards, a position he occupied until his own retirement in 1993.