Watch: Peterson posts workout video as free-agent stint continues

Adrian Peterson isn't the most frequent tweeter, but as his stint on the open market continued into a 15th day, he felt compelled to share a video Friday night showcasing his explosion and fast-twitch muscles.

Peterson remains a free agent, a reality that reportedly is due to his demand to be paid $8 million in the first year of a new contract.

No one is questioning Peterson's ability, even at the age of 32. The former MVP's tweet is likely just a friendly reminder to running back-needy teams.