return specialist
player on the special teams unit of an American football or Canadian football team who specializes in returning punts and/or kickoffs
kickoff returner
in American football, player on special teams who is primarily responsible for catching the opposing team's kickoff and attempting to run it towards the end zone to score a touchdown
punt returner
in American football, a player who catches the ball after it is punted and gives their team good field position (or a touchdown if possible) by returning it