No they dont if they dont wont to
No, the only time a runner is forced to slide or avoid a play is when he has already been determined and called out on the base paths.
When proceeding to first a runner can not retreat towards home nor can they come to a complete stop of forward motion. If they do either of these the the runner is to be called out without need of a tag on the runner or the base. This only applies to a runner between home and first.
The lead runner is the runner at the base closest to home plate when there is more than one runner on base. If there are runners on second base and third base, the runner on third base is the lead runner. If there are runners on first and second, the runner on second is the lead runner. If there is only one runner on base, there is no lead runner.
When it is a home run that wins the game in the bottom half of the last inning. This is known as a walk-off home run. If the runner does not touch first base and the umpire sees this the runner is out.
No. That would be an obstruction and the base-runner would be safe.
To prevent injuries due to collisions on throws to first base. It is only used when a runner is going from home to first. Once the runner arrives at first, it is no longer used...
only in little league
Yes it does count because the runner crossed home before the final out.!
when the pitcher makes his first move towards home.
The act of hitting a runner with the ball does not generally qualify in and of itself as an out. If the base runner is running legally (e.g. does not interfere), then there is no out, and the ball is live. However, if the batter/runner is running illegally, such as running outside of the 3 foot runner's lane between home and first base, the batter/runner will be out if hit by the catcher's throw. If he is going straight to the base, the runner is not out.