His Baseball Reference page lists this transaction link:
- December 10, 1957: Traded by the San Francisco Giants to the Chicago Cubs for Tom Poholsky.
- Before 1959 Season: Sent from the Chicago Cubs to the Philadelphia Phillies in an unknown transaction.
- June 5, 1959: Purchased by the Los Angeles Dodgers from the Philadelphia Phillies. (Date given is approximate. Exact date is uncertain.)
"PORTLAND (AP) The Portland Beavers, currently resting in seventh place in the Pacific Coast League, Monday received outfielder Dave Melton from the Kansas City Athletics in return for pitcher Fernando Rodriguez. Melton was sent to Portland on option and Rodriguez was optioned to Kansas City's Intenational League farm club, Buffalo."
Melton evidently stayed under A's control, but Freddy was under BUFFALO control, albeit in the A's system. The next season, Buffalo became a Philadelphia affiliate, and Rodriguez went along with the ride.
Melton returned to the A's in 1959.