Quarterback is a blue stallion with a hoofball for a cutie mark. He works as a delivery pony - traveling much of Equestia to deliver goods to towns where the Friendship Express doesn’t quite reach. He mostly hauls goods that are either too heavy for a single pegasus to carry or hauls goods to locations pegasi might have trouble reaching from the air.
These short stories center around his daily life (and to an extent his daily adventures) as he travels about Equestria. Every short story can stand alone on its own (so none of the potential chapters have to be read in any order).