BALTIMORE — For most of the early going, Smooth Jazz has been on mute for the Yankees. But Jazz Chisholm Jr. said before Yankees’ 6-2 win over the Orioles Tuesday he is “working my butt off every day to get back” to the player he is capable of being, and the one the Yankees need him to be in order to be their best version. “Everybody gets frustrated with their performance when they’re not doing well,” said Chisholm, who was out of the lineup Tuesday against Orioles lefty Trevor Rogers. “Right now, I’m not swinging well.” After going 0-for-4 with three strikeouts Monday night — three of those at-bats coming with runners in scoring position — and 0-for-1 Tuesday night pinch hitting for Amed Rosario, Chisholm fell to batting just .200 with a .600 OPS this season. He has looked like a shell of the hitter he was last season, when he hit 31 homers and stole 31 bases, leading him to proclaim a goal of 50-50 this season. Jazz Chisholm Jr.…