Make the call -

[Rich Ives]

Originally Posted by ManInBlue

No outs. R3 only. Batter squares to bunt and pops up. As F2 attempts to get out of the box to field the ball, BR runs into him, intentionally, nothing malicious. Place the runner(s), call the out(s).

If you'd rule differently under any rule set, please make the distinction.

Intentionally? How would you judge that? He doesn't have to stop because:

Rule 7.09(j) Comment: When a catcher and batter-runner going to first base have contact when the catcher is fielding the ball, there is generally no violation and nothing should be called. “Obstruction” by a fielder attempting to field a ball should be called only in very flagrant and violent cases because the rules give him the right of way, but of course such “right of way” is not a license to, for example, intentionally trip a runner even though fielding the ball. If the catcher is fielding the ball and the first baseman or pitcher obstructs a runner going to first base “obstruction” shall be called and the base runner awarded first base.