must obstructed runner physically touch base?

[AtlUmpSteve]

Originally Posted by robbie

In NSA it is a dead ball. Yes, in general a Delayed dead ball, but immediately dead if a play is being made on the obstructed runner.

I cannot dispute NSA rulings. However, in ASA (original post), NFHS, and NCAA, the ball remains live with a delayed dead ball UNLESS the obstructed runner is otherwise out when played on while still protected. ASA citation 8.5-B, R/S 36, NFHS 8-4-3(b), NCAA 9.3.

Otherwise:

In ASA, the obstructed runner can be called out for missing a base, despite the obstruction, if properly appealed (8-5.B(1) Exception d Effect, R/S 36). The runner entering dead ball territory ends any opportunity to legally return, as would a succeeding runner scoring.