Runner forced off of legally attained base

[bob jenkins]

A couple of things on this:

1) Here is the NCAA rule, which, on pickoffs, varies from FED and OBR:

Note
On a pickoff play at any base, the defensive player must clearly have
possession of the pickoff throw before blocking the base with any part of the
defensive player’s body. The umpire will call, “time, that’s obstruction.” The ball
is dead immediately, and the runner being played on is awarded one base beyond
the last base he had attained before the obstruction

2) NCAA has (or had when I worked it) a specific directive that if something was not covered in NCAA but covered in OBR (including MLBUM), then use the MLBUM interp.

3) FED had a specific OBS mechanic (the outstretched fist), but has dropped it. I don't think NCAA ever had one (other than calling time (or pointing if the ball wasn't immediately dead) as mentioned in the rule above)