‘Undateable’ Actor Splits Tongue Open Hours Before Live Show

EXCLUSIVE

“Undateable” actor Rick Glassman split his tongue open during dry run and was spewing blood, less than 4 hours before the live show.

Glassman — who plays Burski on the NBC comedy —  bit into a toasted bagel and accidentally chomped down on his tongue. He was rushed to the ER where he got stitches … the photos are disturbing.

We’re told Glassman has a big part in this…