SAN MATEO — A brawl in the backyard of a San Mateo home ended in the arrest of two people Thursday night, police said. Officers went to the home in the 400 block of East Bellevue Avenue around 9:55 p.m. for a report of a fight involving multiple people, according to the San Mateo Police Department. An investigation revealed a 27-year-old man had hit another man numerous times in the head with an aluminum pole, police said, adding that the victim suffered significant injuries.