Jim Harbaugh will play it safe.With their playoff berth already secured and only seeding on the line in the regular-season finale against the Denver Broncos, the Los Angeles Chargers will sit quarterback Justin Herbert.Herbert won’t play in Week 18GettyHarbaugh told reporters that Herbert won’t play against the Broncos.He announced that backup quarterback Trey Lance will make the start, and DJ Uiagalelei will be the backup. Herbert won’t even dress.Harbaugh also mentioned that other starters with ‘the most bruises’ and need ‘the most healing’ won’t play.This puts Denver in position to claim the AFC’s top seed, which they would secure with a win over the Chargers.With the Broncos expected to beat a Chargers team full of backups, Los Angeles will likely be locked into the No. 7 seed and a trip to Foxborough next week.The New England Patriots are currently the No. 2 seed and are still alive for the top seed. The Pats face the Dolphins in Week 18.If both the Broncos and Patriots win, which seems likely, Denver will claim the No. 1 seed, New England will be No. 2, and Mike Vrabel and Drake Maye will prepare to host Justin Herbert in the Wild Card round.More to follow…Herbert has been banged up throughout the season, so the week off will be helpfulGettyStay up to date with the latest from the NFL across all platforms – follow our dedicated talkSPORT USA Facebook page and subscribe to our talkSPORT USA YouTube channel for all the news, exclusives, interviews and more