His blog always sends me to Baseball Reference to look up the players involved, and, in checking Rob Ellis' entry, I found an uncharted move for Ellis from Cleveland's Tacoma club to Pittsburgh's Portland club in 1979.
Research found that move involved two other former major leaguers. From the Spokane Daily Chronicle of June 28, 1979...
“Outfielder Rob Ellis of the Tacoma Tugs has been acquired by the Portland Beavers of the Pacific Coast League.”
“In exchange for the power-hitting righthander, the Beavers will give up infielder-designated hitter Taylor Duncan and relief pitcher Mike Garman.”
Neither Duncan's nor Garman's pages mention this trade.
So thank you to Giovanni (whose work on Rob Ellis appears below) and go check out his blog!
Duncan from www.baseball-almanac.com