Brielle Biermann Tonguing Her Way 'Round First Base With MLB Boyfriend

4/7/2017 12:40 AM PDT
EXCLUSIVE

Brielle Biermann and her White Sox pitcher boyfriend, Michael Kopech, like covering all bases ... even in public.

The couple got in a few innings of suck face and carnival rides last week at a fair in Mesa, AZ ... near where he was hurling 107 mph fastballs in Spring Training at the time.

Judging from these pics, Michael doesn't strike out when he's at bat.