Wayne is an obvious choice, but he did make it to a high level
of play. We've seen many players, who never got out of the box.
In recent years, one such example would be Padin. He came to the
US in 2003, had a cup of coffee at Miami in 2003 and 2004 and
went nowhere. He threw hard, and probably could have made a name
for himself. If someone can find him, maybe he still can?