Talk to me about Obstruction

[chibler]

Hi Fans,
Tell me if I have this right.
In Monday nights NW vs AZ game, 7th inning, Tammy Williams reaches 1st, ball is overthrown, she tries to reach 3rd, slides head first into the 3rd baseman who is blocking the bag. She's called out.

The ball arrived at the 3rd baseman a split second before Williams slid into the 3rd baseman. So, the 3rd baseman had the ball when Williams slid into her.

Now, here's the question. If Williams slides into the 3rd baseman before she gets the ball and can not get to the bag because the 3rd baseman is blocking the bag, then the 3rd baseman receives the ball and tags her, obstruction should be ruled and Williams is awarded 3rd base. Right?

Thanks!
Chris Hibler