When must a base runner be tagged in softball?
When there isn't a runner behind them forcing them to run. For
example, if a runner is on 2nd base but there is no one on 1st
base, the runner must be tagged on their way to 3rd in order to get
them out. However, if there IS a runner on 1st, the 3rd baseman can
simply touch the base because it is a force out.