Yes he was and he was also injured a lot. The fact that Lee is undersized for the position is not debatable. It's a fact. He's 6'2" 234lb's. That's way way too small for a mike.
Being undersized does not make you prone to injury. Provide me with statistical proof that being undersized causes you to be prone to injuries if you want to debate on this.
Russel Wilson is also undersized for a QB. Does that make him more susceptible to injuries than other QB's? No way.
Reasons for being prone to injuries: Having weakened muscles or ligaments in specific areas. Not being conditioned properly, or not stretching properly is another reason. Another reason for injury is putting your body in bad angles/ positions.
Sean Lee is most likely a very conditioned athlete. It would be safe to say that the most likely reason for him being injured is that he takes a lot of RISKS to stop offensive players. He puts his body in vulnerable positions while making tackles and puts the team over his health.
That is the number one reason why he is consistently injured. There is no such ailment called being injury prone. He is a risk taker to stop the offense any way possible. We should be grateful that he isn't one of the defensive players that does not wish to make contact with a RB per say. He tweaked his hamstring in the NO game when he got twisted down during a tackle. He also hurt his neck during a tackle.
Find me scientific evidence that a hamstring injury correlates with a stinger injury. If he was physically weakened and more prone to injury, he would have hurt ALOT more of his body by now.
It is a combination of bad luck, and putting himself into positions that have a chance for injury in an effort to over compensate for the lack of defense on our team.
It is easily fixable by 2 things, a better supporting cast and mental change so he does not repeatedly put himself at risk. Dez does the same thing as Lee does. but he does not consistently take the same punishment.
End of thread. If you wish to dispute provide scientific evidence for any correlation of injuries.