BOSTON — Rubby De La Rosa quietly walked up behind reporters waiting for him and went unnoticed before he got their attention.His actions are much louder on the Fenway Park mound.De La Rosa had another strong home start, going seven solid innings to lift the Boston Red Sox to a 2-1 victory over the Kansas City Royals on Saturday night.“He’s been outstanding at home,” Boston manager John Farrell said. “Even in the couple of situations where we gave an extra base runner, he shut it down and pitched with a lot of poise tonight.”Mike Napoli hit a tiebreaking homer, sending the defending World Series champions to their sixth win in seven games. Boston is looking to climb back into the race from the AL East’s basement.Kansas City’s Eric Hosmer extended his career-best hitting streak to 15 games with a single.