FORT MYERS, Fla. — A late addition to the Mookie Betts blockbuster trade showed up Tuesday at the Red Sox’s spring training facility — an us-against-the-world mentality.

The day after Boston officially traded the star right fielder and left-hander David Price to the Dodgers — putting an exclamation point on a tumultuous offseason, which also saw the club fire its World Series-winning manager and be investigated by MLB for its potential use of electronics to steal signs in 2018 — the Red Sox insisted they are already moving forward with their expectations unchanged.

“We don’t care what anybody says,” center fielder Jackie Bradley Jr. said Tuesday at Fenway South. “We got to go out there and play the game. You don’t know who’s going to win. Go out there and perform, take care of your business, because if you could always guess who’s going to win, then what’s the point of playing the game? You can write us off and you can give us some predictions. I want to see who’s going to be closest.”

Baseball Prospectus obliged Tuesday, releasing its annual PECOTA projections, which pegged the Red Sox for 84.5 wins with a 28.5 percent chance at a playoff spot. The Red Sox won 84 games last season with Betts and Price on their roster, and that was before the Yankees landed Gerrit Cole to make life in the AL East all the more challenging.

But at least on the grounds of Fenway South, there is a belief that the Red Sox can survive and compete for the playoffs in 2020, even without the 2018 AL MVP and one of their top starting pitchers.

“Listen, Mookie and DP were phenomenal players and still are phenomenal players,” reliever Matt Barnes said. “But you look around our team and we’ve got a bunch of All-Stars and a bunch of phenomenal players. We still feel we’re going to compete for a championship.”

Whether or not that happens may depend most on their health and their pitching. The lineup still features the likes of J.D. Martinez, Xander Bogaerts, Rafael Devers and Andrew Benintendi, but the Boston pitching staff has questions.

The Red Sox are banking on bounce-back seasons from Chris Sale and Nathan Eovaldi, who combined for a 4.90 ERA in 215 innings while both battled injuries. Sale was shut down in August with inflammation in his elbow and received a platelet-rich plasma injection, but general manager Brian O’Halloran said Tuesday the lefty is fully healthy, though he currently is sick. Eovaldi, meanwhile, had surgery last April to remove loose bodies in his elbow.

Then there’s the bullpen, which largely struggled in 2019 and did not make any major upgrades this offseason.

“We’re focused on the guys in this clubhouse right now,” Barnes said. “I’ll tell you as many times as you want how great [Betts and Price] were as teammates and people and players. But we’re focused on our clubhouse right now.”

Bradley was particularly close with Betts. The two, both drafted in 2011, came up through the organization together and shared the Fenway Park outfield the past six years.

“Markus is Markus,” Bradley said, calling Betts by his given name. “We’ve been roommates, so to speak, since we first got drafted together. We’re pretty close and we’re like brothers. Sometimes in this game that we play, people go in a different course and that’s OK.”

Now, the Red Sox will try to chart their own new course, which they believe can still include the playoffs in 2020.

“These guys are upset about what happened [last year],” new interim manager Ron Roenicke said. “That’s a good thing coming into this year.”