The current rule 40 says that his name cannot even be placed in nomination at the convention unless he won the majority of delegates in 8 states. The old rule 40 says same thing but with 5 states. Unless he wins at least 50% of the delegates in 4 more states, he is disqualified. The chances of him doing that are pretty much 0 that he will get 50% of the delegates in even 1 more state, let alone 5 ... or 8.
What I was fishing for was whether or not the poster's proposed rule was "can't win on pledged delegates" or "can't win on the first ballot." Certainly, Kasich fits into that group.