runner

the player who is carrying (and trying to advance) the ball on an offensive play

someone who travels on foot by running

fish of western Atlantic: Cape Cod to Brazil

a baseball player on the team at bat who is on base (or attempting to reach a base)

a horizontal branch from the base of plant that produces new plants from buds at its tips

someone who imports or exports without paying duties

a long narrow carpet

a person who is employed to deliver messages or documents

“he sent a runner over with the contract”

a trained athlete who competes in foot races

device consisting of the parts on which something can slide along