None of Boston's everyday starters will suit up in the Friday afternoon spring training opener; you'll likely see them over the weekend when the Red Sox begin playing major league competition. LIVE stream the Celtics all season and get the latest news and analysis on all of your teams from NBC Sports Boston by downloading the My Teams App. But it does give Sox fans the chance to check out some of the team's top prospects, one of whom just came over from the Los Angeles Dodgers in the Mookie Betts trade.