Bloodied In Wild On-Ice Brawl

A huge brawl erupted during the Lightning vs. Maple Leafs playoff game on Monday night ... and things got so violent during the melee, a Tampa Bay player left the ice a bloody mess.

The crazy scene all went down in the third period of Toronto's blowout win ... when a bunch of Lightning players took issue with Wayne Simmonds' hit on Jan Rutta.

Broadcast footage of the game showed Tampa Bay players were so upset with Simmonds, they tried to coax him into a scrap.

But, Simmonds didn't appear to want any of it ... and things seemed to calm down.

However, during an ensuing commercial break -- everyone on the ice got after each other, with haymakers being thrown left and right all over.

Rutta appeared…