Brandon Jacobs (34) and David Wilson practice this afternoon in preparation for the Broncos.

Brandon Jacobs claims he practically pegged for his release in San Francisco before eventually going on twitter to blast the organization for his lack of playing time.

He was subsequently suspended for the final three games of the season and released.

It was during his darkest days in the Bay area that Jacobs said he realized he wasn’t finished as a player. He wears the words he said that were uttered to him by the 49ers management as a badge of honor.

“I didn’t think I was done because they didn’t want to release me,” Jacobs said yesterday. “I was told point-blank, ‘Do I look like a fool? I release you and you’ll be with somebody else and come back and play against us? I felt good about it.

“I’m like, ‘I see, y’all are scared of me. It’s cool. I’m alright.”

Jacobs, 31, described last season as a “curse.” He played in just two games, with five carries for seven yards. He said sitting on the sidelines for a Week 6 against the visiting Giants was his low point.

Even so, the ninth-year pro said the experience helped mature him. He agreed with coach Tom Coughlin, who said Jacobs became “humble” in the past season.

“That is accurate,” said Jacobs, who warmly greeted reporters he often sparred with during his career. “It takes people to go through things and learn and be better. I’m happy I went through that.”

Jacobs said he brought two big suitcases to Tuesday’s audition because he was determined not to fail. His conditioning and his knowledge of the offense gave him the nod over Willis McGahee.

On Sunday, Jacobs is expected to play against Denver at MetLife Stadium. Through his play declined his last two seasons with the Giants, he insisted he can still be as “productive as any running back in the NFL.”

The Giants don’t’ view Jacobs as a savior or starter. Coughlin explained that the team needs a veteran running back to bring physicality to the offense and feels Jacobs can do that.

“Quite frankly, we need him to play,” Coughlin said.

With Andre Brown (fracture leg) out, Da’Rel nursing a knee injury and David Wilson having fumbled twice against Dallas, the 6-4, 265-pound Jacobs will likely be used in pass protection and short-yardage or goal-line situations.

“He’s going to do nothing but help this team,” wide receiver Victor Cruz said.

And help Wilson. The second-year pro joked that he had never seen a running back as big as Jacobs. He added that he doesn’t feel threatened by Jacobs. Coughlin has yet to name a starter for Sunday although he has repeatedly referenced Wilson’s value to the team.

Jacobs said he came here to be a teammate, not a mentor, to Wilson. He said Wilson is a “good kid” and he’ll help him as best he can.

Roughly a month ago, Jacobs weighed upwards of 295 pounds. He was devoting his time to his protein water company, figuring his career might be over. He said he had calls from a “couple” teams but didn’t want to go there.

Then, Jacobs, who had spoken to the Giants by phone and visited training camp, said he got a “gut feeling” he may get an opportunity to rejoin. He began a grueling workout regiment in the searing heat of Atlanta and dropped nearly 30 pounds.

Jacobs cut a mean figure in the locker room on Wednesday, showing off a washboard-flat stomach and bulging biceps. He said he his body feels great.

“I feel blessed,” said Jacobs, who rushed for 4,849 yards and scored a franchise-record 56 touchdowns over seven seasons. “I feel like I’m on top of the world. I’ve been waiting for this for a year and something.”