Every touchdown, extra point, safety, and field goal in "The Duke" Official NFL Football. The Wilson has been the sole NFL football used to score throughout regular and postseason games since 1941. Each genuine leather ball is handcrafted by our seasoned team of expert artisans in Ada, Ohio. They are then tested for durability and air pressure before being shipped to us. During any game played outside of North America, if there is a delay due to weather or other circumstances beyond the control of the teams or league office, then the NFL may use an alternative ball during delayed games. An example would be if there was a threat of snowfall later in the season than normal. The ball could be frozen solid during these delays but it cannot be replaced once it has been used. In this case, each team will be given two balls to begin with, one black and one white. Before every game, both balls will be inspected for marks or stains that might indicate which one was used last. If they differ even slightly, they will be cleaned using a proprietary process that removes the ink used to identify brands on sports apparel. The balls are inflated with water vapor to the desired pressure. Air valves located inside the ball can leak over time due to wear-and-tear or damage from rough play. When this happens, the ball needs to be replaced. Each year, several players suffer injuries while playing with used balls.