The Big Three are officially one step away from the major leagues.

According to a Red Sox source, top prospects Marcelo Mayer, Roman Anthony and Kyle Teel were all informed that they are being promoted to Triple-A Worcester following Sunday’s game in Portland.

Alex Speier of The Boston Globe was first to report the news.

Source confirms Marcelo Mayer, Roman Anthony and Kyle Teel are all being promoted to Triple-A. @alexspeier had it first.

— Mac Cerullo (@MacCerullo) August 11, 2024

Mayer, Anthony and Teel are Boston’s consensus top three prospects and are widely viewed among the most talented young players in the sport today. The three are each in the midst of excellent seasons and are now in position to make a push for a big league promotion before the end of the season.

Mayer was activated from the seven-day injured list on Saturday after briefly being sidelined with hip irritation and ranks as baseball’s No. 10 prospect according to Baseball America. The 21-year-old shortstop, who was the No. 4 overall pick in the 2021 MLB Draft, is currently hitting .307 with eight home runs, 38 RBI and an .850 OPS in 77 games for the Portland Sea Dogs. He has also drawn praise for his defensive play and his leadership abilities.

Anthony, who became one of the youngest Red Sox players to reach Double-A when he was first promoted last fall at age 19, has quickly risen through the system since being selected in the second round of the 2022 MLB Draft. Now 20, the outfielder ranks as baseball’s No. 18 prospect and is batting .269 with 15 home runs, 45 RBI and an .856 OPS in 84 games for the Sea Dogs.

Teel is barely a year into his professional career but has quickly flourished since being selected No. 14 overall in last summer’s MLB Draft. The 22-year-old catcher is batting .298 with 11 home runs, 60 RBI and an .852 OPS in 84 games at Double-A this season, and he now ranks as the No. 31 prospect in the game.

Red Sox manager Alex Cora said following Sunday’s loss that he expects the trio will all play a big role in the majors at some point and that he’s excited to see them take this next step.

“It’s good for them, just go out there and keep getting better,” Cora said. “Like I told them in spring training individually, there’s no age limit in the big leagues. You make it at 19 or you make it at 35, it doesn’t matter, if you’re good, you’re good. The fact that they’re going all together there is going to be fun to watch, they’re going to be a big part of this in the future, they really are, and I’m glad they’re doing an outstanding job.”

All three are expected to make their Triple-A debuts with the Worcester Red Sox on Tuesday, when the team opens a weeklong homestand at Polar Park against the Lehigh Valley IronPigs.