No reason a LH can't play catcher. The advantages and disadvantages are pretty much mirrored with a RH player at that position. There's also no reason why a LH can't play 2B. The throw to 2B bag is actually easier, and the glove is on the forehand side for any throw from the IF to2B. The throw to 1B requires no more footwork than what is required from a LHP, and nobody has a problem putting a lefty there. SS and 3B are more problematic, but an athletic kid can often make it work.