There were rumors that top prospect Vladimir Guerrero Jr. would make his long-awaited major league debut against the Giants earlier this week.

That didn't happen.

Instead, the 20-year-old third baseman will make his debut against the A's on Friday in Toronto.

The Blue Jays finally decided to promote the No. 1 prospect in baseball, making the announcement on Wednesday following their 4-0 loss to the Giants.

Vlad Jr. has been tearing up the minor leagues the last couple of years. This season, in just eight games with Triple-A Buffalo, he is hitting .367/.424/.700 with three home runs and eight RBI.

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Veteran Mike Fiers will start for the A's on Friday night, so he will get the first look at the phenom.

The day baseball fans have been waiting for has arrived, so make sure you're watching NBC Sports California or streaming on the MyTeams app on Friday at 4 p.m. PT.