Garrett finished his college career completing 366 of 550 passes (66.5%) for 4,274 yards and 20 touchdowns. At the time he was ranked in the categories: lowest pass interception percentage (1.8% – school record), total yards of offense (4,555 – second in school history), total yards of offense in a season (2,485 – third in school history), most passing yards (4,274 – second in school history), most passing yards in a season (2,217 – fourth in school history), most completions (366 – second in school history), most completions in a season (204 – third in school history), most touchdown passes (20 – tied for fourth). He continues to hold the Ivy League career record for completion percentage with 66.5% (366–550) and his 1988 percentage of 68.2% (204–299) stood as the league record until 2000, when Gavin Hoffman posted a 70.5% mark.