Sports teach us a bevy of valuable life lessons, such as how to win with grace, how to lose with dignity, and how to trip an opponent without being seen by the authorities. Keep your enemies off-balance with today's Groupon: for $30, you get individual entry in any sports league with Comeback Sports (up to a $75 value, depending on the sport and time of year). Games take place at a number of different area locations, and new seasons are starting up periodically, giving you plenty of opportunities to register before your Groupon expires.

Comeback Sports provides weekend warriors, ex-jocks, and retired mathletes with the opportunity to engage in a variety of team sports within the bounds of a well-organized and healthily competitive atmosphere. Take to the field of recreational battle with the spheroid-clobbering excitement of softball, relive playground heroics with a seven-week season of dodgeball, or recapture glory days spent as a Heisman Trophy model with a season of flag football. Soccer, kickball, and volleyball—plus non-league special events, such as the two-day Comeback Bowl football tournament to be played on the rarified turf of the Stadium Bowl—round out the sporting selection, with each sport overseen by a squad of experienced refs endowed with all of Justice's impartiality but none of her blindness. From average Joes to above-average Joes to the unclassifiable abilities of people not named Joe, all skill levels and blood types are welcome to partake of the eclectic competitive buffet.

Comeback Sports' arrangements with local bars and restaurants make it possible for on-field foes to meet up after the game for discounted refreshments and to honor the match's most well-groomed player with polite applause. Players can also keep tabs on the latest league standings, stats, and standouts with CSPN, Comeback's online repository of information and highlights. Although today's deal is good for individual league entry, players can request to be put on teams with specific friends and ultra-athletic frenemies when registering if they so choose.