"It's exciting for me to be with Hanley and David Ortiz," Sandoval said Tuesday at Fenway Park after finishing up a five-year, $95 million contract that adds him to a lineup he called "The Three Amigos."
About five hours later, the Red Sox completed their day-night news conference doubleheader by announcing Ramirez's four-year deal, which is worth $88 million. A former Red Sox prospect, Ramirez was traded to the Marlins nine Thanksgivings ago in a deal that brought Mike Lowell and Josh Beckett to Boston.
"Why not go back where you belong?" Ramirez said. "It worked out for the both of us: You guys won a couple of world championships. I haven't won any, but that's what I'm here for."
Sandoval helped the Giants win three titles, earning the World Series MVP in 2012 and the nickname "Kung Fu Panda" that helped cement him as a fan favourite. He thanked the Giants for bringing him up as a big leaguer and Giants' fans for their support.
"I want a new challenge. I need a new challenge," he said at his afternoon news conference. "I know that I had a great career in San Francisco. But I'm going to have a new one here."
Sandoval helps fill a hole in the Red Sox lineup for a third baseman and a left-handed bat. Ramirez, who played shortstop and a little third base with the Marlins and Los Angeles Dodgers, is expected to move to left field.
"You're always trying to get a sense of where they might fit in," Red Sox manager John Farrell said. "We're not even at Thanksgiving yet. The potential for some other additions might exist."
Sandoval's deal includes a team option for 2020 and Ramirez's contract has a vesting option for 2019.
A 28-year-old Venezuelan listed at 5-foot-11 and 248 pounds, Sandoval was seen as a potential replacement at designated hitter when Ortiz retires. But Sandoval said he plans to manage his weight so he can remain in the field.
Both players praised Ortiz, and Ramirez also said Dustin Pedroia helped recruit him to Boston.
"He said, 'I've got two rings. You don't have any. I want some more,'" Ramirez said. "That kind of thing pumps you up."
Sandoval said Ortiz gave him advice when he was in the minor leagues that he has carried with him. Having a chance to play with Ortiz, who was the Series MVP in 2013, was a factor that attracted him to Boston.
"To be Papi's teammate — 162 games, all that with him — for me, it's going to be a very exciting time," said Sandoval, who had dinner with Ramirez on Monday night. Ramirez agreed, saying Ortiz was "like a big brother to me."
Sandoval is a career .294 hitter who had 16 homers and 73 RBIs in the regular season this year and then hit .366 in the post-season while helping the Giants win their third World Series in five years.
"He really embodies a lot of what we care about," Red Sox general manager Ben Cherington said. "He's been a big winner. He's been a performer when it counts the most. He's respected as a teammate, loves to play. We think he fits what we're all about here. We're excited to have him."
A 30-year-old infielder who has never played the outfield in 1,634 professional games, Ramirez batted .300 with 13 homers and 71 RBIs for Los Angeles this year. Cherington, who watched Ramirez learn to play shortstop in the minors, said he is confident Ramirez can take on a new position.
For now, the Red Sox are overloaded with outfielders and short on pitchers, having acquired Allen Craig and Yoenis Cespedes at the July trade deadline while shipping off four-fifths of the rotation.
"We've got a ways to go in the off-season," Farrell said.
To clear the roster spots, the Red Sox designated first baseman-catcher Ryan Lavarnway and infielder Juan Francisco for assignment.