Obstruction?

[Manny A]

Originally Posted by mbcrowder

Um ... not a rule. You're inventing stuff here.

From the NCAA Baseball Rule Book under 8-3:

[I]f. Visual obstruction by a defensive player may be called if a fielder interferes intentionally with a base runner’s opportunity to see the ball on a defensive play.

PENALTY for f.—The umpire shall point and call “That’s obstruction.” The umpire shall let the play continue until all play has ceased, call time and award any bases that are justified in Rule 2. If a runner(s) advances beyond what the umpire would have granted and is put out, the runner(s) is out. The offender’s team shall be warned, and a second offense by that team shall result in the ejection of the offending player because of an unsportsmanlike act.

So it is a rule, Mike. I'm not inventing anything.

Also, it did happen in a pro game.

Seattle Mariners vs. Tampa Bay Devil Rays - Recap - August 06, 2004 - ESPN

Not sure where within the authoritative interpretations of pro rules this is covered...