Derek Carr’s return from a back injury was not triumphant. The Raiders lost. Again. Carr had some good news to report after Sunday’s 17-16 loss to the Los Angeles Chargers. He said transverse process fractures didn’t hinder his ability to play quarterback against the Chargers. Every throw was available. He didn’t connect on many downfield. His two long completions to Amari Cooper were negated by penalty. Michael Crabtree’s 23-yard touchdown reception, the passing game’s only explosive pass play, was a catch and run. The Raiders weren’t able to work the ball downfield. Carr didn’t let loose much. Short stuff wasn’t necessary to protect the passer. “It had nothing to do with my back,” Carr said. “They play really soft zone coverage. That’s what (Chargers defensive coordinator Gus Bradley) does. He tries to create pressure and hide some things. Usually, when they play soft, you have to take those.” Carr’s pedestrian stat line didn’t wow. He completed 21-of 30 passes for 171 yards, a touchdown, two interceptions and a 67.5 passer rating. Carr averaged 5.3 yards per pass play, a low sum more common in his early years. Dink and dunk was the strategy Sunday. Carr threw just five passes 10 yards or more in the air, and completed three for 50 yards and an interception. The other 25 were short-range throws, with five behind the line of scrimmage. The passing game had just one big play all day, and couldn't sustain success often enough to generate enough points. Carr said the full playbook was available to him against the Chargers.