Yankees’ Giancarlo Stanton has started baseball activities

BALTIMORE — The Yankees don’t expect outfielder Giancarlo Stanton back before rosters expand in September, but he has started baseball activities, according to manager Aaron Boone. “He hit off the tee [Tuesday], still doing light running on the treadmill. He is definitely moving in the right direction,’’ Boone said of Stanton, who is on the…