ATLANTA — The Atlanta Braves are set to introduce their roster, including an all-new outfield, to their home fans. They also can show off a 3-0 record, thanks to their first season-opening sweep in eight years, when they begin a weekend home series against the New York Mets on Friday night. Atlanta traded fan favorites Jason Heyward, Craig Kimbrel, Justin Upton and Evan Gattis, among others.