LOS ANGELES -- Amid the franchise's first 0-5 start since 2003, Chargers coach Jim Harbaugh said Monday that he and the team's ownership group are "in this fight together" to turn the season around.

When asked if he feels any pressure from an ownership perspective to turn this around, Harbaugh said: "John Spanos, Dean Spanos, Susie Spanos, the whole Spanos family. It's shoulder to shoulder where we're in this fight together."

He emphasized that he's "hell bent" on reversing the course and returning to winning ways. The Chargers have faltered after coming into the season off back-to-back 11-6 seasons.

Being a former 14-year NFL pro could offer Harbaugh the unique experience of knowing what it's like to be in the locker room during a poor stretch. During his final season as a player, he played for the then-San Diego Chargers, who went 1-15 after an 0-5 start.

How he reconciles with a locker room under similar circumstances prompted a simple message.

"Keep fighting. Keep being a leader. Keep being a competitor. Keep being the believer that you've been and even more," he said.

Harbaugh the player might have been able to navigate this run, but for Harbaugh the coach, this is uncharted territory.

Dating back to last season, the Chargers have lost eight games in a row. It's the longest losing streak of Harbaugh's head-coaching career, college or professional, according to ESPN Research.

He isn't tapping into anything extra to turn the tide.

"I think one of the things that we were all put on this Earth to do is to handle both success and handle loss and to do that with the same passion and enthusiasm," Harbaugh said. "And to show that, that you belong. That it can be turned around. There is winning football and that's what we're doing as a team."

For Harbaugh, his confidence in shifting the season's momentum lies in the group at his disposable. Injuries, though, continue to hamper the group, specifically in the offensive line and wide receiver rooms.

Tackle Joe Alt is still undergoing testing for his neck injury, while left guard Kayode Awosika (fibula) is "healing and rehabbing to get back as soon as he can," Harbaugh said. Four rookies started on the line against Denver on Sunday.

Wide receiver Ladd McConkey suited up after missing all of practice the previous week due to a foot injury. However, he did not play and stood on the sideline in uniform without his helmet. Harbaugh said McConkey was "an emergency situation" and will be worked into practice this week. Wide receiver Tre' Harris picked up a hamstring injury in the game and is now week-to-week. That means the entire first- and second-string wide receivers are all dealing with nicks: McConkey, Quentin Johnston (chest), Harris and Brenen Thompson (quadricep).

The Chargers' 23-17 loss to the Broncos on Sunday was one that Harbaugh blamed himself for due to a fourth-and-1 call in the fourth quarter. He was still upset about it and apologized Monday.

"I really have the same feeling that I had last night after the game when I talked to you all. I still feel like those two fourth-down decisions, especially the one fourth-down decision, did not put our team in the best chance to win that game," Harbaugh said. "I regret that. I'm even sorry about that. I don't say I'm sorry unless I think I'm wrong about something and I sincerely think I was."

The decision proved to be costly as the Broncos scored five plays later to tie the game and steal momentum. Quarterback Justin Herbert then turned it over on the Chargers' next two possessions before a sack ended the game on their final drive. Meanwhile, the Broncos scored on three straight drives to close out a victory.

Herbert is up to a league-high eight interceptions, making uncharacteristic plays and throws. He also had a costly fumble in the fourth quarter against Denver.

Harbaugh backed his quarterback, further highlighting the players that give him confidence the season can be salvaged.

"The way [Herbert] competes, it's like few others I've ever seen. He's doing anything and everything week in to help us win, and I applaud those that do that," Harbaugh said. "Our players that competed [Sunday], those that don't back down and those that are determined to turn this season around."

Los Angeles will need some of that and more as it faces the undefeated Kansas City Chiefs on the road to avoid an 0-6 record.