The Arizona Diamondbacks have banned a season ticket holder for the remainder of the 2025 season following an incident of fan interference during a game at Chase Field on June 30.
The fan, identified as Dave McCaskill, was involved in a controversial play during the eighth inning of a close game against the San Francisco Giants. With the Diamondbacks leading 3-2, San Francisco’s Christian Koss hit a deep fly ball to left field. Arizona outfielder Tim Tawa attempted a leaping catch at the wall, but McCaskill reached over and caught the ball, appearing to interfere with the play.
Initially, umpires ruled Koss out. However, after a video review, the call was overturned, and Koss was awarded second base due to the fan interference. Despite the confusion, the D-backs held on to win the game 4-2. McCaskill was ejected from the stadium shortly after the incident.
The Diamondbacks released a statement the following day confirming that McCaskill had been banned from returning to Chase Field for the remainder of the season. According to the team, McCaskill has a history of inappropriate behavior at the ballpark. The team also noted that they typically avoid releasing information about specific fans, but chose to address this situation publicly due to mounting media interest and speculation.
“This particular fan has been involved in multiple offenses at Chase Field,” the team said. “As a result, we’ve terminated his Advantage Member account. He is prohibited from attending any more games at Chase Field in 2025. However, he may return in 2026 if he complies with the Fan Code of Conduct.”
McCaskill, a longtime fan and known collector of baseball memorabilia, responded to the ban in an interview with FOX 10. He expressed regret for the incident, stating that his actions weren’t intentional.
“I want to apologize to the Arizona Diamondbacks and the fans,” McCaskill said. “I didn’t mean to interfere with the play. I’m glad they ejected me—it was the right call. That’s not how the game should be affected.”
He also mentioned that he’s been part of 10 previous fan interference reviews and has caught over two dozen home run balls from his seat in left field over the years.