Without the proper equipment, athletes would have to make their own shuttlecocks out of ping-pong balls tied to feathers and have to catch every baseball with a bag of peanuts. Gear up for big games with today's Groupon: for $15, you get $30 worth of fitness apparel, footwear, and sporting goods at Sports Authority. This Groupon is valid at the following locations: Roseville, Richfield, Minnetonka, Coon Rapids, Maple Grove, Eden Prairie, Coon Rapids North, Burnsville, and Woodbury.

With 9 stores in the Minneapolis area, Sports Authority equips athletes, campers, and sports fanatics with apparel and equipment from top-name brands. Men's sportswear such as Champion fleece hoodies ($27.99+) and Nike compression shorts ($14.98+) wick away summer-hoodie sweat, and Sports Authority also carries a new line of New Balance women's apparel, exclusively launched at its stores. New Balance's form-fitting running skirts ($38) and Minimus WT20 running shoes ($99.99) keep the body cool and centered during intense workouts, and the women's shirred capris ($34) and tie-dye yoga tank ($35) fit snugly and fashionably during meditative stretches and Grateful Dead–themed fun runs.

Just as U.S. law demands a bowling ball teeter precariously over every closet shelf, Sports Authority balances its apparel with team-sports equipment, from youth footballs ($20+) to Adidas shin guards ($12), as well as gear for action sports such as in-line skating, snowboarding, and paintball. Fans of the outdoors can shop for camping and hiking equipment, such as Kelty daypacks ($109.95) and Eagle Claw fishing rods ($9.99+), or pitch a Coleman Sundome tent ($84.99) in the backyard for shelter against bocce-ball hailstorms.

Visit Sports Authority's Facebook page for more information.