Type B Obstruction - BAL@BOS

[Jay R]

I had a similar play which brings up a question.

In my play, F3 and the BR collide slightly after a bad throw to first base. F3 starts to go retrieve the ball as the BR starts to run towards second base and there is brief contact between the two players.

My question, does all of the responsibility belong to the fielder to get out of the way of the runner? Or would it be incidental contact? In my situation, it did not matter because the bad throw had been covered by F4 and the runner was not going to make it to second base.