1. When he plays outside, he does not bowl on the dry.
2. He almost always uses a very strong, early rolling ball, esp. when he's playing outside.
3. When it is dry for him, he is playing deep inside with everyone else in the PBA.
He doesn't bowl outside on the dry-ish lanes we often see in 2nd shift leagues or in house where the owner or manager doesn't want to spend a penny on maintenance.
He can play the 5th or 6th arrow if he wants to or if he thinks he needs to. You just don't see that on TV where, most of the time, they bowl on fresh medium to heavy oil.
"None are so blind as those who will not see."