The media is going crazy without knowing the rule just like some here.
(11) In running the last half of the distance from home base to first base, while the ball is being fielded to first base, he runs outside (to the right of ) the three-foot line, or inside (to the left of ) the foul line, and in the umpire’s judgment in so doing interferes with the fielder taking the throw at first base, in which case the ball is dead; except that he may run outside (to the right of ) the three-foot line or inside (to the left of ) the foul line to avoid a fielder attempting to field a batted ball;
1) The rule makes no sense. If the rule indeed needs to be that he has to run on the right of the foul line, the base has to be in foul territory as well. You can't expect a guy to run on one line, and then need to change course at the last second. If he can run to the left of the foul line, which he can, then how can he be said to interfere if he can't even see the ball and makes no movement to either side to interfere? What was he supposed to do? He ran in about as straight a line as you can.
2) Because of number 1, this rule is never applied in a case like yesterday where the runner runs on a straight line and doesn't move to impede the fielder. His left foot hits the middle of the bag, he never makes it out of the baseline. It was absolutely asinine for the ump to call that when that is never, ever, ever called. To change that in a win or die World Series game is beyond terrible.
3) Leaving such a rule to be a "judgement call" is crazy, either the runner ran where he was supposed and allowed to or not. I understand there is the matter of fielding the ball along the baseline which will always rely on judgement calls, but for all other cases, they should have clear rules of where the runner can run, and that's it.
4) Why did they take 12 minutes at a crucial pint of a World Series game to read a 20 second rule to the umpires? Indefensible. Aside from just being an annoying delay in the most important game of the year, such delays affect players (especially pitchers).