During the Yanks’ extra-innings lost in Baltimore on Tuesday night, Mariano Rivera did something he had not done all season: He walked a batter. Amazingly, the world did not end. With that walk, Rivera ended a stretch of 19 straight appearances this season. It was the longest such streak to start a season for Rivera, and stretching back in 2007, Mo hadn’t allowed a base on balls since over his previous 23 appearances. But that wasn’t even the longest streak of his career. From June 12, 2007 to August 15, 2007, Rivera went 24 appearances without issuing a walk, and from June 26, 2005 to August 31, 2005, Rivera went 31 appearances covering 35.1 IP without issuing a free pass. Damn, this guy is good.