The runner can't dissapear, but the rules do specify what they are to do. They aren't forced to slide, but they must avoid the fielder. A case might be made under any of the following rules if you read them as written. Open to other interpretations.
USSSA...
Usssa Strike Zone. Any part of ball over any part of plate between armpit and top of knees.
So ball could be mostly below knees if 1% of ball is at top of knee but 99% is below. Same for armpit. Ball could be pretty much all above the top of armpit except a sliver of it so essentially at the...
Last one. Usssa my reading of the rules seems to tell me that pretty much in all cases a runner must avoid a fielder. Can’t make contact if fielder is on the bag when no play is being made. Can’t make contact in the base path rundown or not fielder has ball or not. If fielder is obstructing...
USSSA 12U Batter steps out of box in the way of catchers throw to 3rd. Is called out for interference. Coaches and parents and girls are clueless. Have no idea what rule is or how to not get called out. Parents coaches all yelling stay in the box. This is deep in national tournament winners...
Unsure on this one. Runner at 2B collides with SS fielding a grounder. Dead ball interference. Runner out. Batter goes to 1B
Or
Delayed dead ball. SS throws runner out at 1B anyway. Both are out.
I’ve had it called both ways. USSSA rule says the first way is right. But 18.8.H also says runner...
Popup lands on the right edge of the chalk 30 feet past 1B. Ump calls it foul because the line runs down the middle of the chalk and it hit on the foul side of that line.