Conversation so far:
What was Joe McGinnity's first gig?
At the age of eight, Joe McGinnity and his older brothers went to work in the mines to support their family.
Where did Joe McGinnity grow up?
Due to the transient lifestyle of coal miners, his family moved frequently during his childhood. Joe McGinnity lived in Springfield, Illinois, Decatur, Illinois, and later in Krebs, Oklahoma.
Are there any other interesting aspects about the Joe McGinnity's early career besides working in a mine at age 8 and living the transient coal miner lifestyle?
While living in Decatur, Joe McGinnity began playing baseball with other coal miners in their leisure time.
Did Joe McGinnity play baseball often while growing up?
Joe McGinnity played baseball for the local team. He increased baseball's popularity in the area, and as he organized, managed, and pitched for teams in Krebs
Did Joe McGinnity pitch for any other team besides teams in Krebs?
A team in Krebs began traveling to other towns along the Missouri–Kansas–Texas Railroad to play against their local teams. Joe McGinnity also pitched for teams in neighboring towns.
How did Joe McGinnity do as a pitcher during his early career?
John McCloskey, the manager of the minor league baseball Montgomery Colts of the Class-B Southern League, heard about Joe McGinnity's pitching and signed him.
How did Joe McGinnity bait the umpires?

Question: How did mcGinnity use what he learned about baiting the umps?
Self-contained rewrite: How did Joe McGinnity use what he learned about baiting the umpires?