FOXBOROUGH, Mass. — For the fourth straight year, the Patriots started 1-3.

For the first time during that stretch, there’s a new head coach trying to get the team back on track.

Coach Jerod Mayo confirmed internal frustrations during a morning press conference Friday, which followed players making public criticisms of each other earlier this week and receivers looking exasperated on the field last Sunday during a loss at San Francisco.

“It’s always frustrating when you’re not winning. The guys put a lot of work in, and everyone wants to try to find a solution right now, while we’re going through this transition. So, people are definitely frustrated,” Mayo said. “And that’s a normal human response. I feel pretty good about the way that we’re going. … it’s part of the transition.”

In a Thursday podcast on their own website that’s since been edited, team reporter Evan Lazar said things were getting dire in the locker room after the loss to the 49ers.

“Right now, they’re teetering on a mutiny in that locker room. I was in that locker room on Sunday, the defense is mad at the defense, the offense is mad at the offense,” Lazar said. “You have young receivers who are throwing tantrums … at what point in time do some of these guys say to themselves ‘why am I out there getting my butt kicked and Drake (Maye) can’t? Why am I going out there with a quarterback that can’t get me the football when we have a Ferrari back in the garage?’ ”

The following is an exchange between Mayo and a reporter on Friday.

Q: A team employee on a team-produced show yesterday said he felt the team was ‘teetering on a mutiny.’ That’s a quote. Understanding what that means, have players demonstrated to you that they want a change in leadership and/or openly defied your orders or those of the coaches?

Mayo: My focus is definitely on the Dolphins, 100%, and the guys in the locker room. So I haven’t heard that. I mean, that’s journalism for you. I’m not sure.

Q: But it’s from the team, so I wanted to check with another team employee here.

Mayo: Like I said, I haven’t heard that and try not to pay attention to that stuff. You’ve gotta ask him.

Like the Patriots, Miami is 1-3 and riding a three-game losing skid, thanks in part to critical injuries. The Dolphins are the only team scoring fewer points than the Patriots, though frustrations have spread across both sides of the ball in New England.

Defensive tackle Davon Godchaux said Monday that teammates played selfishly against the 49ers. Mayo relayed later that he had shared that same message to players in a team meeting, compelling them to play within the defensive scheme. Mayo has also said multiple times this week he expected the Patriots to struggle this season, his first at the helm and their first at the start of an expected long rebuild.

“When I took this job,” he said Friday, “I knew the lumps would come.”

INJURY REPORT: As it turns out, the Patriots offensive line isn’t just losing David Andrews.

On Friday morning, Mayo announced that the Patriots would place Andrews and rookie tackle Caedan Wallace on the injured reserve. The move for Andrews was expected after the center opted to undergo a season-ending shoulder surgery.

Wallace now ends up on the injured reserve after suffering injuries in back-to-back weeks. The third-round pick started his first NFL game against the New York Jets in Week 3 but left that game due to a knee injury. Wallace was active for last week’s loss against San Francisco but suffered an ankle injury. The rookie left the West Coast on crutches and with his foot in a boot.

On Friday, it looked like guard Sidy Sow was limited as well. That could put the team in a situation where they have to move Michael Onwenu from tackle to guard on Sunday.

“It’s tough when you have musical chairs on the offensive line,” Mayo said. “But hopefully we can kind of settle that down.”

Defensively, safety Kyle Dugger was the only active player missing at practice Friday, indicating he will be out against Miami.