I have been told it is a balk in Federation rules for a pitcher, with runners on base, to throw to a fielder who isn't at a base if he isn't making a play on a runner. Can't find it in the rules.
Situation under discussion is a runner on second. Pitcher in set position turns to throw but ss isn't covering, so he tosses the ball to ss at the ss's normal fielding position while the unthreatened runner looks on in amusement and saunters back to the base unmolested.
Is this legal? Is it a balk? Delay of game? Something else? Does it matter if the pitcher disengages from the rubber first? What are the consequences, if any?