Dodd attended Byrnes High School and was the starting quarterback for three years there (2007 to 2009). During his sophomore campaign, his first as a starter, he threw for 3,202 passing yards and 32 touchdowns."#19 Chas Dodd" . scarletknights.com. Retrieved November 19, 2011. He set the school record for most passing yards in a game on October 5, 2007, when he had 462 against Hillcrest.Johnson, Zachary (2010). Byrnes High School Football. The History Press. pp. 151–153. In his junior year, Dodd passed for 2,927 yards and 28 touchdowns. In his senior year, he established a Byrnes HS record with 4,163 passing yards during the season, while completing 252 of 391 passes (64.4%) with 51 touchdowns.
