Catcher Errors

Unless the runner advances an additional base, I don't think you charge an error to anyone (regardless of whether it was the catchers bad throw or the MIF missing the catch). I think it's just a stolen base for the runner, because in most cases it's going to be tough to decide whether the runner would have been out.

If the runner does advance, I think the catcher is going to get the E most of the time, unless it was a complete whiff by the MIF. Obviously airmailing it into CF is a catcher error...I think the catcher is probably getting the error on a bounce or an offline throw as well, even if it "should" have been handled.

Emanski is correct. You generally don't presume an out on a steal attempt, therefore the advance to 2nd is simply a SB. If a bad throw permits a further advance that would be an E, but if there is no further advance there is no E.

An exception to the presumption can be made if, e.g., the MIF has the ball waiting for the guy and just plain drops it. Then you could score a caught stealing plus an E on the MIF.

... and also, the catcher gets an assist on that play.

And just FYI for plash3 (and you may have known this already), passed balls do not count as errors for the catcher.