Mariners fans could have a whole new way to show support for Cal Raleigh soon ... as a porn site tells TMZ Sports it's aiming to give away butt plugs to Seattle fans at Wednesday's ALCS Game 3 in honor of the star catcher.
A spokesperson for CamSoda says as Raleigh and his famous nickname -- the "Big Dumper" -- keep shining in the postseason, it wants to capitalize on the craze by doling out sex toys ahead of the Ms' huge tilt with the Blue Jays.