After all the hype and all the waiting, Vladimir Guerrero Jr. is finally heading to the major leagues.

Blue Jays manager Charlie Montoyo announced on Wednesday that the 20-year-old phenom will join the club in Toronto on Friday as they open their series against the Oakland Athletics.

"It's a big moment for the Toronto Blue Jays," said Montoyo after Wednesday's 4-0 loss to the San Francisco Giants. "The number one prospect in baseball is coming Friday so it's a big moment for us. Hopefully he becomes what everybody thinks he's going to become and that's going to be good for all of us...the City of Toronto, the Blue Jays, the organization."

Guerrero, who was not expected to be with the big club out of spring training, was sidelined by an oblique injury in early March and began the season in high-A Dunedin once he recovered. After four games, he was promoted to Triple-A Buffalo where he hit .367 with three home runs.

"He's pretty special, he's fun to watch," said Blue Jays pitcher Clay Buchholz. "I actually pitched to him a couple of times (in spring training) and he definitely hit a really hard ball off me...I think it's gonna be good.

"His Dad was the first hit that I gave up in the big leagues, so it's pretty neat to be around (his) son...I think everybody's looking forward to it."

Guerrero mashed in 95 games combined at four minor-league levels last season, hitting .381 with 20 home runs and 78 RBI. He also carried a slash line of .381/.437/.636.

Following the regular season, he played 19 games in the Arizona Fall League with the Surprise Saguaros, hitting .351 with 17 RBI.

He is the No. 1 prospect in baseball according to rankings from Baseball America, MLB Pipeline and Baseball Prospectus.

The Jays signed Guerrero as a 16-year-old for $3.9 million in July of 2015. He is the son of Baseball Hall-of-Famer Vladimir Guerrero, who spent 16 seasons in the league mostly with the Montreal Expos and Los Angeles Angels.

Montoyo was asked if he has any expectations for the rookie.

"Just relax and play, just like I told him in spring training. You know, do your best...and he will."