The laws of nature are clear-cut for most predators. Catch your food, kill it, and eat it. It also helps if you're bigger, faster, stronger, or smarter than thing you're trying to catch.

Out of all the predators we've documented, classified, and studied, what is a Pro Football Reference website.

Need some convincing about the AV score? Here's a list of the top-five career scores: Reggie White (226), Bruce Smith (223), Ray Lewis (222), Rod Woodson (192), and Derrick Brooks (190). Still not convinced? Here's 6 to 10: Junior Seau (189), Lawrence Taylor (182), Ronnie Lott (161), Rickey Jackson (160), and Michael Strahan (160).

(For perspective, the average career AV score for all 7,495 players in the Pro Football Reference database was 17.8.)

Football's Platypus

To quantify Troy Polamalu’s career performance, we compared his career AV score against all other defensive players' career AV scores. More specifically, Polamalu's score was compared to all defensive players who started their career between 1970 and 2014. Polamalu's career AV score is 117, which is the top 1% of all defensive AV scores. He's ranked 68th out of the nearly 7,500 defensive career players from the Pro Football Reference database -- that's 35 years of defensive players. And Polamalu is 68th.

One caveat to this analysis could be that, as players play in more games, they have more chances to accrue a higher AV score. Thus, there could be active players who haven't played as many games as retired players. To account for this, we built an average AV score based on the number of games for each player's career. For all defensive players who have played at least 16 games, the average AV score per game is 0.27. Polamalu is tied for 21st of all time with 0.74 AV points per game. The highest ever, by a long shot, is superman dove over both offensive and defensive lines to sack Kerry Collins at the exact moment the ball was hiked? That's stuff you couldn't do in NFL Blitz. Remember when he ran back that intercepted pass from Joe Flacco to seal the 2008-2009 AFC championship game, and every child born in Pittsburgh that year, male or female, was named "Troy"? That was amazing.

As Polamalu ends his illustrious and probably -- definitely -- Hall-of-Fame 12-year career, he leaves us with plenty of highlights and memories. He never showboated, he never argued, and he never gave less than 110%. His elegant ferocity was reminiscent of old-school football -- a dinosaur in modern times. A once in a generation player, it might be a long time before we see someone so controlled both on and off the field.