This is the first time the Chargers have sold tickets through Groupon, a team spokesman said. They’ve partnered with Groupon, an online daily discount company, to offer a package for Sunday’s game against the Panthers. When the online deal launched Monday, they needed to sell 13,000 tickets for the Panthers game by Thursday to avoid a third straight blackout and fourth in the past six games. If not enough tickets are sold by 1:05 p.m. It’s a move that comes off as a little desperate, but they’re far from the only team cutting prices or taking unusual steps to move tickets in December for teams out of the playoff hunt. The $68-per-person deal combines one pass for “endzone-level seating” and a $20 voucher for food and drinks at a stadium concession stand, according to the website.