How would you call these OBS in ASA?

[Roger Greene]

Don't have a book with me at this time, but most rules also contain the words "and all other runners affected by the obstruction in the penalty.

I think it would be a stretch to say that the trailing runner was affected, unless you judge he was prevented from advancing because of the preceeding runner's obstruction. I wouldn't want to try to explain to the protest committee or UIC that the obstruction caused the trailling runner to advance too far!

Roger Greene