In his senior season, Dawson became the all-time Ivy League career rushing leader, with 4,841 yards. Dawson earned this title on November 11, 2006 while playing Penn with a 55-yard run down the left sideline on his second carry of that game. In attaining this title, Dawson broke the long-standing record set by Ed Marinaro of Cornell in 1971. In addition to this record, Dawson finished his Harvard career as the Ivy League record holder for rushing touchdowns (60), career touchdowns (66), career points (398), and career all-purpose yards (6,138). He broke every career rushing and scoring record that Harvard keeps and became the only offensive player in Ivy League history to be named a first team All-Ivy selection four times. He was the ninth NCAA Division I player to rush for at least 1,000 yards in a season four times. He won the Boston Globe Gold Helmet Award, recognizing the top season-long performance by an FCS player in New England, and finished ninth in the voting for the Walter Payton Award. Dawson led the Division I FCS in scoring (13.20 points per game). He finished his career ranked 16th in NCAA FCS history in rushing and tied for fifth in career rushing touchdowns and fifth in career points.