The San Francisco 49ers attempted to explain their decision to move up to No. 3 in the draft and what that may mean for the future of Jimmy Garoppolo. 

The Niners essentially admitted they plan to draft a quarterback at No. 3, and they intend to hang on to Garoppolo, barring a significant trade offer for him.

"We're in a situation where when you bring in a rookie quarterback, to me it's always better, especially on the team that you have, if you've got a veteran starter there already who you like and you're comfortable winning with, that's usually the direction you want to go," Kyle Shanahan said. "And not throw someone else out into the fire until they're fully ready, and that's the situation we're at. ... I think Jimmy, it's going to be hard to find a quarterback who gives us a better chance to win than Jimmy right now, especially even a rookie in the draft. ...

"Now, if someone wanted (to give) something for (Garoppolo) and it could make our team better in a lot of other ways, you listen to that, but it also depends on how good you feel about that rookie. And we're not there yet right now. Odds are, we probably won't be. That's why we're happy that we don't have to be that way. We've got a guy in here who we know we can win with, a guy our players love, that we love and we're excited to have him this year, and we're excited to have a hell of a quarterback right behind him learning for when the time is his."

The Niners believed all five of the quarterbacks they're interested in selecting would be off the board by they drafted at No. 12.

"We felt pretty strongly we were gonna get left at the altar sitting there at 12," Shanahan said. "There are five guys that are kind of at this party a little bit, and people are talking about them going everywhere. They're all over in the first round. Our feeling is these guys were going to go a lot higher than people realize."

The San Francisco 49ers have traded up to the No. 3 pick, sending the No. 12 pick, a 2021 third round pick and first round picks in 2022 and 2023 to the Miami Dolphins.

The 49ers will be in the mix to select a quarterback at No. 3, but they don't currently have any plans to trade Jimmy Garoppolo. The top quarterbacks in the draft are considered to be Trevor Lawrence, Lawrence Fields and Zach Wilson.

The Dolphins have now essentially turned Laremy Tunsil into four first round picks and a third round pick.

The New York Jets have agreed to a one-year, $2 million deal with Tevin Coleman, according to a source.

Coleman will be reunited with Robert Saleh and several assistants, all of whom left the San Francisco 49ers after the season.

Due to injuries, Coleman has rushed just 165 times over 22 games the last two seasons.

The San Francisco 49ers have agreed to sign Alex Mack to a one-year, $5.5 million deal.

Mack previously has worked with Kyle Shanahan with the Cleveland Browns and Atlanta Falcons.

Mack is a six-time Pro Bowler at center.

Alex Mack is expected to sign with the San Francisco 49ers, according to a source.

Mack played under Kyle Shanahan with both the Cleveland Browns and Atlanta Falcons.

The center is a six-time Pro Bowler.

The San Francisco 49ers have agreed to a historic deal with Trent Williams.

According to sources, the two sides have reached a six-year, $138 million deal that will make Williams the highest-paid offensive lineman in NFL history.

The deal includes $55.1 million guaranteed and a $30.1 million signing bonus.

Kyle Juszczyk and the San Francisco 49ers have agreed to a five-year, $27 million deal with $10 million in guaranteed money.

Juszczyk became the highest paid fullback in NFL history back in 2017 when he signed with the 49ers.

He has earned five consecutive Pro Bowl bids, beginning in 2016, his final season with the Baltimore Ravens, and the past four seasons with the 49ers.

The San Francisco 49ers have called the Carolina Panthers about a possible trade for Teddy Bridgewater, according to a report.

John Lynch said last week that there was no doubt Jimmy Garoppolo would be San Francisco's quarterback in 2021.

Bridgewater signed a three-year deal with Carolina last offseason.