49ers GM Trent Baalke: ‘I feel bad for the fans’

A fan holds up a sign of San Francisco 49ers general manager Trent Baalke during the first half of an NFL football game between the San Francisco 49ers and the Tampa Bay Buccaneers in Santa Clara, Calif., Sunday, Oct. 23, 2016. (AP Photo/Ben Margot) less A fan holds up a sign of San Francisco 49ers general manager Trent Baalke during the first half of an NFL football game between the San Francisco 49ers and the Tampa Bay Buccaneers in Santa Clara, Calif., ... more Photo: Ben Margot, Associated Press Photo: Ben Margot, Associated Press Image 1 of / 13 Caption Close 49ers GM Trent Baalke: ‘I feel bad for the fans’ 1 / 13 Back to Gallery

ORLANDO — The 49ers’ on-field results haven’t changed, and neither has Trent Baalke’s message.

Blame him.

Before the 49ers’ franchise-record 10th straight loss, a 31-24 setback at Miami on Sunday, Baalke went on KNBR with team broadcasters Ted Robinson and Tim Ryan and said ownership shouldn’t be faulted for the 1-10 season. Baalke, whose job security is in question, also backed CEO Jed York in a conversation with reporters before a loss in Arizona on Nov. 13.

The 49ers’ biggest free-agent signings in the offseason were left guard Zane Beadles and reserve quarterback Thad Lewis.

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“I feel bad for the fans. I feel bad for a lot of people, the ownership in particular,” Baalke said. “You know, they give us everything we need, and I’ve said that. I’ve gone public with that. If we don’t get it done, put it on me. We’ve got all the resources necessary.

“Funding has never been an issue at the free-agent market, or any other thing that we’ve needed. So, it falls strictly on my shoulders. I’m disappointed, I’m disappointed with the outcome up until now.”

Baalke has invested heavily in defense in recent drafts, but the 49ers are on pace to allow 500 points, which would be the fourth most in a season in NFL history. A major issue has been the run defense, which is allowing a league-worst 171.8 yards a game.

Baalke agreed with Ryan, who suggested that part of the run-game problems have been tied to the defensive alignment and scheme.

“We’ve tightened things down, inside the tight end, which has helped, and we needed to,” Baalke said. “We’ve gotten ourselves in situations where we’ve been stressed, especially at the inside-linebacker position, and it’s cost us some games.”

Baalke was asked about Miami running back Jay Ajayi, a 2015 fifth-round pick who ranks seventh in the NFL in rushing yards (847) and second in yards per carry (5.3). Baalke, who has selected seven players coming off major knee injuries since 2013, said Ajayi’s medical file contributed to his tumble to the fifth round.

Ajayi sustained a torn ACL in 2011. ESPN reported after the 2015 draft that his surgically repaired knee had “bone on bone.”

“The only reason he fell in the draft was for medical reasons,” Baalke said. There “was a little uncertainty of how long his career would be. But he certainly held up this season and hopefully he holds up for a long time. He’s an exciting back.”

The 49ers selected running back Mike Davis in the fourth round in 2015, 23 picks before Ajayi was drafted. Davis is averaging 2.0 yards on 54 career carries and has been a healthy inactive the past three games.

Roster moves: The 49ers placed inside linebacker Shayne Skov, a Stanford alum, on injured reserve after he sustained a knee injury Sunday. They filled his roster spot by promoting safety Marcus Ball from the practice squad.

The 49ers also signed linebacker Wynton McManis to the practice squad. McManis spent training camp with the 49ers.

Injury report: Outside linebacker Eli Harold (toe), wide receiver Quinton Patton (concussion) and defensive lineman Ronald Blair (undisclosed) were not participating at the start of practice. Outside linebacker Aaron Lynch (ankle), who has missed four games, was practicing on a limited basis.

The 49ers don’t have to submit a practice participation report until Wednesday.

Eric Branch is a San Francisco Chronicle staff writer.