Photo by Tom Pennington/Getty Images

In what now seems to be an annual occurrence, Cowboys linebacker Sean Lee will miss an extended period of time due to injury. 

Lee injured his hamstring in last night's road loss to the Seattle Seahawks. 

Losing the captain is a big blow to this Cowboys defense that had been playing above expectations thus far this season. 

Losing their field general puts a lot more weight on the shoulders of rookie Leighton Vander Esch out of Boise State. If he can step up and take on that bigger role, the Cowboy's defense shouldn't take too much of it a hit, but any time you lose a linebacker like Lee, you have to expect some sort of downgrade. 

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David Kaestle is not a FanDuel employee. In addition to providing DFS gameplay advice, David also participates in DFS contests on FanDuel using his personal account, username davekaestle. While the strategies and player selections recommended in his articles are his personal views, he may deploy different strategies and player selections when entering contests with his personal account. The views expressed in their articles are the author's alone and do not necessarily reflect the views of FanDuel.