There is virtually nothing more exciting than a game-changing player on defense.
You know, the type of player who can intercept a pass and return it 83 yards for a touchdown. Or the player who can sack the quarterback, force a fumble, recover the fumble and rumble 25 yards to give his team excellent field position. Or even the linebacker who holds the other team's running back to 38 yards on 20 carries.
The best game-changing players are almost always the best defensive players. Remember a game changer isn't always a playmaker. For a modern example, take Nnamdi Asomugha of the Oakland Raiders. He's intercepted one pass in the past three seasons, yet he's one of the biggest game-changing defensive players in the game today. Why? Because he is so good that teams just don't throw his way.
The following list includes the 10 biggest game-changing defensive players in the history of the National Football League. With a list like 10, it's impossible to put every great player on the list. As great as players like Bob Lilly, Merlin Olsen, Rod Woodson and Mike Singletary were, they just didn't quite make this list.