San Diego Chargers #43 Darren Sproles Alternate Jersey. If you need a piece of NFL football jerseys to prove yourself is Chargers fan. This Darren Sproles Alternate Jersey by Reebok is for you. This jersey is made of durable, quick-drying polyester diamond back mesh and showcases the screen-printed team name and player's number on the chest. The player's number is screen-printed on the chest, center back, and sleeves, and his name is screen-printed on a sewn down nameplate at the upper back.