I'm seeing a growing number of people claiming that a high number of carries from previous year = increased injury risk. I dont buy that at all. Its really about the RBs current health, his age, and the workload he will receive this comeing year. A current heavy workload = current high fantasy points = current increased injury risk. But past heavy workload doesnt increase this year's fantasy points or injury risk. The reality is that RBs at the top of fantasy one year (who are the ones who got a heavy workload) are more likely to go downhill than uphill as a natural result of balance. The reality is that a heavy workload back has an increased injury risk because he's carrying the ball more. The reality is that a back who has sustained minor injuries in the past has an increased chance of reagravateing those injuries or makeing them worse. The reality is that the older a player gets, the increased risk of injury he has because age makes you both more fragile and makes it harder to recover from injuries. Those are realities. Trying to point to the statistics though and saying its because of the "number" of carries he had the year or two or three before is not reality. The statistic is the result of reality, not the other way around.Kevin Smith is still young. That makes him a lower risk than an older back. Kevin Smith's injuries (every football player gets injuries, they doesnt mean they cant play with them) in college do not look very meaningful (as opposed to Stewart and others). His college carry tally actually shows good durability and current healthy status and he's unlikely to begin his NFL career getting a heavy workload. That makes him a low injury risk this year but also not a high fantasy pick because you want heavy workload RBs on your fantasy team.
Based on the record, there IS an increase injury risk if the carries in the previous season are very high. Looking at the 2007 archives, there is an articleentitled Larry Johnson's 417 carries. That article lists 25 running backs that had exceeded 370 carries in a season. Of those 25 running backs, nine (36%)of those players did not play a full season the next year (I didn't include those that played 15 games based on the fact that they might have sat out thefinal game of the season due to having a playoff spot clinched). Those players missed an average of 6.9 games the season following the one in which theycarried the ball at least 370 times. The low on games played the following season was Jamal Anderson in 1999 with two games played. The high on gamesplayed the following season was C. Okoye with 14 games.Whether the reason is reaggravating an injury from the season before or whatever the reason, it looks to me like a player with number of carries is atincreased risk of injury. One additional year older doesn't account for that high an injury rate the following year. Many of those players went on to havegood seasons after the injury year (J. Lewis, J. Bettis, M. Allen, etc).