from fangraphs: Some teams will grade for components of command (throwing quality strikes) with control (throwing it in the strike zone, usually closely following walk rate) from ESPN: A pitcher with control can throw strikes. He'll usually get the ball over the plate, doesn't often fall behind a hitter, and will rarely hand out free passes to first. In that manner, he remains in control of the at-bat. Hitters often get defensive against control pitchers, expanding their strike zone and chasing pitches they might lay off when facing pitchers with less control. Command more specifically describes a pitcher's ability to hit the catcher's target seemingly at will. If the catcher sets up on the outside corner at the knees, a pitcher with good command will deliver the ball right on target and the catcher will hardly have to move. If a pitcher has command, he's less likely to fall behind a hitter and issue walks, but he's also rarely going to leave a pitch over the middle of the plate. or here: http://www.beyondtheboxscore.com/2011/9/2/2400473/another-scouting-primer-how-to-scout-pitchers