The chase scene at PNC Park was filmed on August 22, 2010, during an actual game. The Pirates beat the Mets 2-1. John Singleton wanted to film a chase scene there, which was not in the script, with a small crew with Taylor Lautner doing his own stunts.
Nathan wears a Pittsburgh Pirates shirt, #21 with the name Clemente on the back. Roberto Clemente was a star player for the Pirates. He was the first Latin American to have 3000 hits, and the first Latin American elected into the Hall of Fame, posthumously. He won 12 golden gloves, 15 All-star selections, lifetime .317 batting average, and played in two winning World Series, being MVP in the '71 series. He died on a flight to Nicaragua on the 31st of December, 1972, flying with emergency relief items to help after the earthquake there. The statue outside PNC park (which was possibly going to be named after Clemente before PNC bought the naming rights) - where Nathan leaves a ticket - is of Roberto Clemente.