Jim Harbaugh’s team had a somewhat quiet off-season in terms of veteran additions. However, the onus for the Los Angeles Chargers this year was to upgrade an offensive line that was beset by injuries at both tackle spots and suffered from poor play on the interior. Quarterback Justin Herbert took a beating, and the offense had its ups and downs. In free agency, general manager Joe Hortiz made some modest moves with the signings of center Tyler Biadasz —cast off by the Washington Commanders—and right guard Cole Strange (Dolphins). As it turned out, Hortiz was saving his best work for April’s draft. He turned the Chargers’ five picks into eight selections, and he used four of those choices on offensive line help. The Chargers’ defense will look familiar in 2026, with a notable exception Kevin Jairaj-Imagn Images Then there’s the other side of the ball. Hortiz re-signed the likes of ageless edge rusher Khalil Mack, linebacker Denzel Perryman, and safety Tony Jefferson.…