Simpson lacks the desired size for an early down running back. He runs with limited knee bend and lacks the agility to work with lateral elusiveness. He's a tough runner, but offers marginal burst through the line and into the second level. Simpson's rigid running style makes it hard for him to fit smoothly into the shape of the running lane, but he will bang and crash into bodies, falling forward for additional yardage. His running and pass-catching aren't particularly exciting, but his return potential might pique the interest of teams looking to sign an undrafted free agent at the position.