Didi Gregorius was well aware of Manny Machado’s impending free agency even before it gained national attention, when Aaron Judge told the Orioles’ shortstop that he would “look good in pinstripes.” And while many expect the Yankees to make a serious run at Machado following this season, it can be easy to forget that Gregorius has developed into one of their top players, having made a seamless transition in replacing Derek Jeter. “I know he and [Washington’s Bryce] Harper are going to be free agents and everybody wants to see where they go,” Gregorius said before the Yankees played the Astros at Steinbrenner Field on Friday night. “People are already talking about it everywhere. I’m not surprised. It’s just the way baseball is.” Gregorius, who is arbitration eligible after this season and set to hit free agency following the 2019 season, said he’s been able to block out the chatter for the most part — but he knows he won’t be able to avoid it forever. “Of course I worry about my future,” Gregorius said. “You never know what might happen. If they bring [Machado] here and trade me, then what? If they bring him here and I’m still here, then what? I don’t have to worry about what people are saying. I just have to go play my game and everything will take care of itself.” For now, Gregorius is the starting shortstop and a key left-handed bat in a lineup that includes right-handed sluggers Judge, Gary Sanchez and Giancarlo Stanton. On Friday, Gregorius hit cleanup, following Stanton and Sanchez, with Judge getting the night off.