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Pitcher throws to first what normally would be a catchable ball except runner diving back to first keeps first baseman from making the catch. Ball gets by first baseman and runner advances. If this is an error is it throwing error on pitcher or fielding error on first baseman. Neither seems to be at fault because of runners action. If no error is runner credited with stolen base or advances on the throw

Pitchers should be throwing pick offs right to the first baseman's mitt. First basemen should be on the pitchers side of first base and not between the runner and the bag. The only reason the runner should normally get in the way is if they purposely run in front of or into the first baseman which would be offensive interference. Since that wasn't called I assume either the throw was off or the first baseman was in the wrong place. Assign the error based on that.

I had similar question. Runner on second and the catcher throws down to the second baseman to try to pick off the runner. Second baseman catches the ball and tags the runner off the base but the runner knocks the ball out of the second baseman's glove with her knee as she attempts to get back to the base. Everyone properly positioned defensively. Is it an error on the second baseman or do you even assign an error?

ixamnis wrote:I had similar question. Runner on second and the catcher throws down to the second baseman to try to pick off the runner. Second baseman catches the ball and tags the runner off the base but the runner knocks the ball out of the second baseman's glove with her knee as she attempts to get back to the base. Everyone properly positioned defensively. Is it an error on the second baseman or do you even assign an error?

If the runner doesn't advance to third I say no error. If she does move to third I'm als interested how it would be scored

I would score an error if the runner does go to third. The fielder is in charge of securing the ball.