The Chargers are the worst field-goal kicking team in the league. Whether that changes in the near future could hinge on better health, better performance – or better talent. Kicker Nick Novak remains day-to-day with a back injury, one that eventually sidelined him on Thanksgiving in Dallas. The Chargers still blew out the Cowboys 28-6, but the team isn’t taking any chances this week, even as a 13-point favorite against the winless Browns. The Chargers plan to work out three or four kickers on Tuesday, and could potentially sign one as an “insurance policy” if Novak doesn’t recover in time for Sunday’s 1:05 p.m. kickoff at StubHub Center. “If Nick’s better at the end of the week, we’ll probably go with Nick,” Coach Anthony Lynn said Monday. “But if not, we’ve got to look at other options.” One of those options could be Younghoe Koo, the undrafted rookie whom Novak replaced four games into the season. Koo beat out Josh Lambo in training camp, but struggled in September, making just one of his first four field-goal attempts. A week after seeing a potential game-tying kick blocked by the Broncos in Week 1, the former Lou Groza finalist missed from 43 and 44 yards against the Dolphins — a game the Chargers lost by two points.