Dottin will arrive in Toledo with three years of eligibility remaining.
Jack Fracyon, Matt Traynor, TJ Malone, Jack Posey, Grant Haus, Kevin Winkoff, and Ellie Hollin earned All-American honors from USILA and IWLCA Thursday.
The event is free for fans, but donations of $10 for adults and $5 for kids are typically encouraged in support of Uplifting Athletes.
Barbour joins the group as USC searches for a new athletic director.
The club will grant members an open bar, private restrooms, Wi-Fi, and a unique view of the team taking the field at home games.
Williams will officially step into the role on June 12.