Chris Nash/GettyPolice in Boston arrested a man at an MBTA station Sunday night after officers were called to a report of a man harassing passengers with his pet rats, authorities said. MBTA Transit Police said officers found the man at Haymarket Station at around 7 p.m. with the rodents, named Tom and Jerry. The suspect had several outstanding warrants on charges including failure to register as a sex offender and making criminal threats. The man, who was not named but described as “well known”