Injury Rates By Position
The table below sums up injury rates for each position and totals for all positions. Further explanations and details follow the chart.
2015 NFL Injury Data
.... the average NFL player has about a 4.1% chance each game of suffering an injury that will prevent them from playing in the following game. The average injury that does cause a player to miss at least 1 game has a mean average length of 3.1 games missed. All told, a typical NFL player can expect to be healthy and available for about 14.2 games out of 16 per season.
Overall, injury rates are fairly consistent across different positions, with a few exceptions.
As expected, running backs are at the highest risk of injury, and their injuries average significantly longer in length than any other position. The data shows fullback surprisingly at a low risk, but it is the only position that really has too small a sample size (just 6 injuries) to draw conclusions based on their low usage. Quarterbacks and offensive lineman are least likely to be injured, but the risk for starters at those positions is still similar to other positions as explained below.
Adjusting for Playing Time
At this point, you may be wondering "what good are per game averages if some players are out on the field all game while others sit on the bench?". And you would be right. Iniitally, we intended to analyze the injury rate on a per snap basis. But perhaps the most surprising finding in the whole analysis is that overall, the percentage of snaps a player plays in a game doesn't have much predictive value toward whether they will be injured.
It seems counterintuitive, but anyone who has spent much time looking through weekly injury reports can confirm that they have probably been surprised to find that about half the players on them each week don't even regularly see a starter's share of snaps. So what gives? Our most reasonable conclusion is that the explanation lies in the combination of the following factors:
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