Through the deal, FanDuel will have access to marketing assets such as LED and scoreboard video signage, along with radio, television and digital advertising for its DFS products.
The operator’s advertising will be prominently featured at the Steelers’ Heinz Field stadium, with the partnership running throughout the 2019/20 NFL season.
Matt King, FanDuel CEO, said: "We truly admire the historical franchise the Steelers have built and Pittsburgh is an incredible sports town.
"Our Pennsylvania customers love their teams and players. By partnering with the Steelers, we’ll further deliver on our promise to engage fans and meaningfully grow our brand."
In July, FanDuel launched its mobile sportsbook in Pennsylvania through its partnership with Boyd Gaming.
The operator has since expanded into Indiana and Iowa, while also securing an official betting partnership with MLB.