In the first month that it was available, Mariota was tops in NFL jersey sales, edging out Tampa Bay Buccaneers quarterback Jameis Winston, who was the first overall pick.
The ranking is based on sales on the NFL's official online store from May 1-May 31.
"It's surreal for me, it's such an honor," Mariota said Wednesday in a radio interview with The Midday 180 in Nashville. "For me it's one of those deals, looking back on it in the future, it's a crazy, crazy deal for sure."
New England Patriots quarterback Tom Brady was third on the list. That suggests strong support for Brady over the past month, though Brady has worn the same jersey for the past 15 seasons, longer than any other player whose jersey finished in the top 15 best-selling jerseys in May.