A romantic rafting trip turned bloody for NBA star Kevin Love and his model girlfriend, Kate Bock -- when the couple fell overboard and she bumped her head ... requiring staples to close to wound!
The two were rafting in Wyoming when things went south ... they were riding in the front of the inflatable raft (without helmets) when they were ejected from the boat.
They were smiling in the water -- but when Kate was pulled back into the boat, it was clear she suffered a head wound .