Where to spot the ball

[Geof]

Originally Posted by ChrisNE

If the ball is being put into play from the baseline and does not touch a player inbounds before going out OOB at the opposite baseline, it returns to the original throw in location, correct?

That is correct. The throw-in ends when it is legally touched by another player. Because the ball was never touched and went out of bounds, it is given to the other team at the original throw-in location.