He may get none of the delegates and he may get all...or something in between.
The point is that he has none of them now and no claim on them.
His chance is exactly equal to the other three candidates.
That is simply not true, but if you want to believe that, go right ahead.
The fact is, in many cases the outcome is a foregone conclusion, based on the local delegates that have been chosen to go to the next round of voting, some of whom are bound to vote for a candidate, others of whom were picked because they promised to vote for a candidate.