SANTA CLARA, Calif. — The San Francisco 49ers suspended running back Brandon Jacobs on Monday for the final three games following a series of posts on social media sites addressing his lack of playing time, including one during the weekend saying he was “on this team rotting away.”

The 49ers made the announcement about two hours after coach Jim Harbaugh’s news conference, but provided no explanation for why Jacobs, a former Assumption High School standout, had been disciplined. It is doubtful he would return for the playoffs.

Harbaugh declined to address Jacobs’ comments, even when asked whether Jacobs was still on the team. He said he was invoking his “fifth amendment” right.

The 30-year-old Jacobs has five carries for 7 yards while playing in only two games for the NFC West-leading Niners (9-3-1). He spent his first seven NFL seasons with the New York Giants and has called this his “worst” year — though he knew he was joining a crowded backfield that features three-time Pro Bowler Frank Gore as one of the faces of the franchise.

In recent days, he posted a series of photos of himself playing for the Giants — and even a picture of his two Super Bowl championship rings, side by side.

“I am on this team rotting away so why would I wanna put any pics up of anything that say niners,” Jacobs said in an Instagram post Saturday. “This is by far the worst year I ever had, I’ll tell you like I told plenty others.”

On Twitter later, Jacobs said: “I don’t understand why people are angry at me because I wanna do what I am paid to do, I am a competitive person, I think people should be mad if I didn’t wanna play. ... As for all of my Instagram photos I don’t have any niner pics, if you’ll find me some pics I’ll put them up.”

Jacobs, hampered by a left knee injury earlier this season, spends about 20 minutes before games punching the goal-post padding. He has said it is his way of dealing with the situation.

Last month, Jacobs posted advice on Twitter with a reference to never working “in a place where you hate your boss so much, you should always be happy at work” with a hash tag of “YouLiveAndYouLearn.”

Ravens fire coordinator

OWINGS MILLS, Md. — Cam Cameron was fired Monday as offensive coordinator of the Baltimore Ravens, who have lost two straight and are still striving for consistency in the running and passing game.

Cameron ran the Baltimore offense since the start of the 2008 season for coach John Harbaugh. This year the offense ranks 18th with 344.4 yards per game.

Jim Caldwell, who was hired as quarterbacks coach before the season, will assume Cameron’s duties. Caldwell was head coach of the Indianapolis Colts from 2009-11.

Harbaugh didn’t give a detailed explanation for the move, which came less than 24 hours after the Ravens lost to the Washington Redskins 31-28 in overtime.

“We put 28 points up, so you’re not going to say it’s a reaction to a down offensive performance. It’s not that. I think that’s really important to point out,” Harbaugh said. “It’s what I believe is best going forward for our offense and for our football team.

“Cam was doing a heck of a job here. He was doing a heck of a job here for a long time. Nobody knows that better than me, and nobody has stated that more times. I believe that. I also believe right now at this time, the timing says this is the best thing, and this is what we’re going to do.”

The move comes with the Ravens stuck in their first losing streak since they dropped three in a row in October 2009. Yet Baltimore (9-4) needs only one win to sew up its fifth straight playoff appearance and holds a two-game lead in the AFC North over Cincinnati and Pittsburgh with three games to play.

Mularkey out of hospital

JACKSONVILLE, Fla. — Jacksonville Jaguars coach Mike Mularkey is out of the hospital and feeling fine.

The Jaguars said Mularkey was released Monday afternoon after a brief stay that included tests. Mularkey showed up at the facility a day after his team’s 17-10 loss to the New York Jets and started feeling ill. He went to a team trainer, who took him to a nearby hospital.

The team offered few other details about his illness.

But the Jaguars (2-11) say Mularkey is expected back at work Tuesday.

Defensive coordinator Mel Tucker had informed players about Mularkey’s absence at a team meeting Monday afternoon.

Tucker said Mularkey “seemed to be doing pretty good” and looks “forward to having him back in here.”

Raiders reinstate McClain

ALAMEDA, Calif. — The Oakland Raiders reinstated linebacker Rolando McClain from the suspended list on Monday and cut starting cornerback Ron Bartell in the team’s latest roster shake-up.

The Raiders (3-10) also cut backup fullback Owen Schmitt and promoted cornerback Chimdi Chekwa from the practice squad as they plan to get a better look at young players down the stretch of another disappointing season.

McClain had been suspended for two games on Nov. 30 for conduct detrimental to the team after a practice run-in with coach Dennis Allen. McClain did not practice Monday and is not required to return to the team until he meets with Allen, who was in Texas on Monday for his father’s funeral. The team says Allen will discuss McClain’s role with him after he returns.

General manager Reggie McKenzie declined to comment on the moves, and Allen will not be available to discuss them until he returns to practice on Wednesday.