Big Ten signing day storylines 

December, 17, 2013
12/17/13
8:00
AM ET
Signing day is only 50 days away and there are plenty of questions surrounding the big day. Big Ten programs still have a ton of top prospects on the board, which means there could be some impactful decisions coming in the near future.

Here is a look at some of the top storylines in the conference leading up to signing day.

ESPN Sport Science - Randy Gregory Ruins A Tackling Dummy
NFL Draft prospect Randy Gregory delivered a hit that knocked the head of a tackling dummy, one of the hardest hits ever measured in the lab. To see more of how Gregory fared, check out the ESPN Sport Science draft combine special on April 23.
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