The Big 12 Conference fined Arizona State $25,000 on Tuesday in response to fans storming the field during the final moments of Saturday’s 28-23 win over BYU.The league also issued a public reprimand to the school for the chaotic ending in Tempe, Ariz. Fans streamed onto the field thinking the game was over and tore down a goalpost, but there was time remaining and a lengthy delay ensued to sort things out.”The safety of student-athletes and all game participants is our foremost priority,” said Brett Yormark, the Big 12 commissioner. “We will continue to work with our institutions on event management policies at all Big 12 venues.”