It's not reviewable, but it wasn't interference. It probably would have been interference if Betances' throw had hit him. There has to be actual interference in order to be called interference. I'm OK with that...I don't want umpires making things up. If it didn't happen, the rest doesn't matter. In this case, it didn't happen. Similarly, a fielder can't obstruct a runner if the runner doesn't attempt to advance.