Red Sox GM Theo Epstein said tonight that he acquired Jeremy Hermida because he saw the chance to buy low on a player with considerable promise."It was a chance to get a guy with unfulfilled potential for a reasonable cost," Epstein said.It's impossible to predict whether Hermida can become a star, but Red Sox saw "positive indicators" that suggest the 25-year-old can improve upon the .259/.348/.392 line he posted for the Marlins this year.Hermida hit .284/.398/.436 th...