Obstruction base awarding (I think)

[Whowefoolin]

Runner goes to second trying to hoof out a single. Bad, lazy throw to second, but second baseman is camped infront of second base.

Runner slides into second and gets hung up on the second baseman and doesn't make it to second. Throw comes in and tag applied.

I have obstruction because of the "camping" by the second baseman. My question, is the runner only awarded second (which would be an award of 12") or does he get third too?

Please explain if he gets third. I was told he does.