SAN FRANCISCO — Because he signed for a team led by Ronald Acuña Jr., most of Mike Yastrzemski’s starts this season have come in left field. But Acuña is on the IL at the moment, and there probably wasn’t a whole lot of conversation with the Atlanta Braves coaching staff about how they should line up their outfielders on Friday. Yastrzemski is starting in right field in his return to Oracle Park, as he should. Nobody has ever mastered the tricky right field dimensions in San Francisco better than Yastrzemski, who was traded away last July and then signed with the Braves in the offseason.In recent weeks, though, Jung Hoo Lee has come close. And that’s no surprise to Yastrzemski, who also has watched his friend take off offensively. “He’s really turning into the player that I knew he could be and that everyone knew he could be,” Yastrzemski said Friday afternoon. “It’s really nice to see him have that success because I saw the ups and downs of the last couple of years, and he’s worked his tail off. He’s worked as hard as anyone, and it’s been impressive to see what he’s...