Granite may meet your criteria as a batter also. In an article by Seth in August 2016, Granite stated he always hit left handed pitchers better. His splits in 2016 against RH pitchers were: .296/.348/.36 (749); against LH pitchers they were: .291/.345/.339/ (.684). His slugging against lefties was down, but the rest of his numbers against lefties were surprisingly close to his numbers against RH pitchers. In 2015 against RH pitchers his splits were:.248/.322/.312 (.634) and against LH pitchers : .314/.421/.373 (.794). He would be an incredible pinch runner late in the game. Last year he had 56 steals in 72 attempts. With him on first base, the next batter would get more fastballs, because the catcher and pitcher would be worried about Granite dancing off first base. Granted he has very little power, but so does Grossman have little power. So our disagreement may come down to whether the Twins would benefit more from a fast, good fielding OF, a gifted base stealer who hits lefties as well as he hits righties, who has no major league experience or a very poor fielding, OF who has major league experience and who hits lefties well, but not righties. How often would the Twins' opponent have a lefty pitching (way fewer lefties than righties) and how often would the Twins' opponent change pitchers to pitch a righty or lefty to Granite or Grossman. Not often I would submit, because neither is going to hit it out of the park. Finally how often would Bux, Rosario, or Kepler need a rest for a minor injury or just because they need a day off. or because a tough lefty was starting for the Twins' opponent , thereby necessitating the Twins playing an admittedly poor fielding Grossman vs. a good fielding speedster like Granite?