Tyler Glasnow, coming off a marvelous Opening Day start in Miami, will take the mound against the Red Sox at Fenway Park for his second outing of the season tonight. The right-hander unveiled the new slider he developed all spring to great effect against the Marlins, giving him a three-pitch mix heading in his first outing of the season against an American League opponent. Glasnow pitched through back stiffness last time out but said he’s fully healthy. First pitch is set for 7:10 p.m. ET.