For those wondering, Marshawn Lynch has a trademark on "Beast Mode" which includes any t-shirts made with the BM trademark. I note that Musclepharm, the sports nutritional supplement company that signed an endorsement deal with Michael Vick, recently released these t-shirts.
Unless Lynch has licensed the BM trademark to Musclepharm, he may have to send a cease and desist letter and/or sue. It was a smart move by Lynch and his management company to TM "Beast Mode". Its starting to pickup steam and hopefully we'll see more Beast Mode runs in the future.
Now only if he could get Skittles to pay him.