Our best lefty I can think of, he had high ave. in league for about 9 years, Synthetic and new balls, he's no where near top anymore. Not old age either, he's younger than my hubby still.

I used to bowl left handed, changed to right. Now I'm curious what it would be to go back to left. My ave. was same after my switch the following year. BUT that was years ago.

Oly advantage I see for a lefty, less bowlers on their lines. But if the lines not there for the lefty poor guy is lost.
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Kathy, From PA!
Big mouth, loves to talk.
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I wish I knew as much about bowling as my son.
He's not a bragger but mom sure loves to share his good times!