[Steve M]

Daryl,
The "traditional" view is that there can be no interference on a running lane violation on a walk - because, as you said, it is an awarded base.

Several years ago, I think it was 2000, Fed pronounced that ALL bases must be run legally. This meant that a running lane violation was posible, AND was to be called, if it occurred on a walk.

2000 was a year that I attended a national school in Philadelphia. This was a big topic of conversation in the hospitality room. And there were some heavyweights in this room. Each was disappointed in Fed's position and were pleased that neither ASA nor NCAA agreed with Fed's position.

Addition - I'm going to add a plug for ASA's national school to this - since I said that there were some real heavyweights in the hospitality room. The classroom work is good, but the real benefit that I found was in this hospitality room. We had 3 national staff members, 3 state uic's (1 future state uic who is a prolific writer on this board was also at the school), a number of people who had worked national championships, international championships, lots of NCAA championship play, and lots of high school state championship play. Where else is your typical umpire going to have access to this depth of skill & knowledge in a relaxed & casual environment. If there is a way for you to go to one of these national schools, go.

Since that time, it has also become the NCAA position.

I am sure that if your state people check with the Fed, they will find that a running lane violation is possible on an awarded base.

For the plays you listed - the answers are the same regardless of whether there are rother runners.
A - Before the running lane, that's a live ball - everybody should be moving.
B - Approx 15 feet from 1B, that's a running lane violation - Dead Ball, B/R is out, every other runner to return to the base they had at the time of the throw.