Blue Jays pitcher Ryan Borucki has just been banned 3 games ... after MLB officials say he purposely drilled Rays' outfielder Kevin Kiermaier in a game Wednesday night.
Borucki plunked the Tampa Bay star in the 8th inning of Toronto's tilt with the Rays ... and EVERYONE in the building knew it had gone down because of Kiermaier's card-stealing antics earlier in the week.
If you missed it, as Kiermaier was sliding into home plate during the two teams' game on Monday .