Special teams are, as implied by the word, special.
Chase Reynolds is, by design, supposed to be invisible. His three most notable plays of 2014 were the three penalties he committed. He's not a running back, despite what he's listed as on the official roster. He's not even on the offense. Don't get it twisted.
Chase Reynolds is a special teamer. And he's good at it. Very good.
He's also a perfect example of the value of the practice squad. Reynolds spent two years on the Rams' special teams before being elevated to the regular squad and featuring in special teams in 2013.