The Eagles made it to the NFL Championship Game in each of Pihos' first three seasons with the team. In 1947, the team captured its first division championship. In the playoff game against the Pittsburgh Steelers for the Eastern Division title, Pihos blocked a punt to set up the first touchdown in the Eagles' 21–0 win. The Eagles then lost 28–21 to the Chicago Cardinals in the 1947 NFL Championship Game. Pihos caught three passes for 27 yards in that game and intercepted a pass while playing defense. The Eagles then won consecutive NFL championship games in 1948 and 1949. Pihos scored the only offensive touchdown of the 1949 championship game via a 31-yard reception in the second quarter during a heavy downpour.