I remember watching this as a 9-year old kid. The opening scene showed Gibson nearly drowning in the Everglades. His airboat had wiped out.
Tom Wedloe(Dennis Weaver) immediately recognized him as "the guy who beat the Red Sox 3 times in the World Series", which had happened some 4 months earlier.
Later on, Gibson admonished Mark Wedloe (Clint Howard) about using trickery--including the "old, quick just pitcheroo"--in Little League. I'd love to see this episode again if it can be located.