I prefer the NFHS definition of obstruction (runner impeded by a fielder not in possession of the ball and not making an initial play on a batted ball. I prefer the OBR penalty.
Differences: This would not be obstruction because the runner was not impeded until well after Royce had the ball. Another difference is if the throw takes the fielder into the path of the, that is not obstruction in OBR. I prefer NFHS, which puts the onus on the defense to make a throw that doesn't cause a fielder to obstruct a runner.
Now for the penalty - NFHS awards a minimum of one base for any obstruction. OBR has Type I and Type II. Type I is when the play is being made on the obstructed runner - minimum of one base. (I'm OK with the award in last night's game, just not crazy about the rule calling that obstruction.)
For type II, at the end of the playing action the umpire will "impose such penalties, if any, as in his judgment will nullify the act of obstruction." Picture the batter rounding first on a base hit and tripping over the first baseman. The cutoff man sees that and throws to first to get him. Type II (not being played on when obstructed). Award first. (NFHS would award 2nd.)