Obstruction

[sprivitor]

My concern was that the 2 fielders involved in the rundown are blocking the line, therefore, impeding the progress of the runner. The runner chooses to not crash into the fielder, but rather slows progress to the base and even attempts to go around the fielder. The ball is caught after the runner is to the side of the fielder and a tag is made.

The runner reached the fielder before the ball did. So it seems as though it may be obstrution.

What if the runner crashes into the player while the player is waiting for the ball in which the ball is enroute but the runner reaches the fielder before the ball? Would this be obstruction? Would it be interference if the player crashes into the catcher at home plate when the catcher receives the ball just as the runner is reaching home?