Los Angeles Dodgers outfielder Jason Heyward underwent a "significant" adjustment to his swing mechanics this winter, according to manager Dave Roberts. "I think he might have unlocked something," said first baseman Freddie Freeman, who is very happy to be reunited with his former Atlanta teammate. Heyward has been in decline now for a while and is just hoping to make the team in spring training as a non-roster invite. The 33-year-old veteran slashed just .204/.278/.277 with a career-low .556 ...