Gary Puttmann had a nifty 14-1 record with the Greenville Mets in 1966. That earned him a slot as a non-roster invitee with the New York Mets in 1967.
The attached photo shows him with the Greenville Mets. It's from the Greenville (SC) News of August 14, 1966.
Baseball-reference.com doesn't currently list his home town. He's from Lawton, Iowa.
Gary Puttmann Register Statistics & History | Baseball-Reference.com