Conversation so far:
Where was Hoyt Wilhelm born?
Hoyt Wilhelm was born in Huntersville, North Carolina
Did Hoyt Wilhelm like baseball at a young age?
What position did Hoyt Wilhelm play?
James Hoyt Wilhelm was an American Major League Baseball pitcher
What is an interesting fact about Hoyt Wilhelm's early life?
Hoyt Wilhelm practiced honing a knuckleball with a tennis ball, hoping it was his best shot at Big League success.

Question: Was he a valuable player?
Self-contained rewrite: Was Hoyt Wilhelm a valuable player?