COSTA MESA, Calif. — Los Angeles Chargers coach Anthony Lynn received some slightly good news Monday when it was announced that running back Melvin Gordon is week to week after he sprained the medial collateral ligament in his right knee during a 45-10 win over the Arizona Cardinals.

Lynn said that the fourth-year running back is “highly doubtful” for this week’s key AFC showdown at Pittsburgh but that he is hopeful of returning before the end of the regular season.

“We are taking it week by week. You can never count him out since he recovers quickly,” Lynn said.

Gordon, who rushed for 61 yards and two touchdowns, was injured Sunday when the Chargers ran a reverse during the third quarter and he was leg whipped to the ground by Cardinals defensive tackle Robert Nkemdiche. It was a curious play call considering it was the first time Los Angeles had run that and they were comfortably ahead.

Lynn did not second-guess the call, noting that they were still trying to be aggressive with a 28-10 lead.