What Makes Baseball Fun
This is a tough play to call. The responses below are from current and former MLB Umpires.

- I think the fielder was so far out after catching the ball that the runner did not interfere even though this slide was wide. There was no contact at all and the fielder went outside on his own.

- That was interference under the old rules....

- It does look like this is not a Bona fide slide but the umpires may have determined there was no interference on the play. You need to have both. I couldn’t tell if the runner made contact with the fielder or not. As you know contact is not needed but it would make it much easier.

- It is an illegal slide. He did not reach or try to reach and stay on a base. The other element that is necessary to call slide rule violation is that he actually hinders the play. On this one it does not look like he hindered the play. Under the new slide rule violation that goes to Replay the runner has to reach and attempt to stay on the base. Back in our day or likely if the umpire called it on the field, just being close enough to actually reach the bag is the standard for calling interference