The Montreal Expos were going for it.
Sitting at .500 and with their eyes on the postseason, the Expos decided to make a deal on May 25, 1989.
So Montreal acquired southpaw Mark Langston from the Mariners for RHP Brian Holman, RHP Gene Harris and some left-handed pitcher named Randy Johnson.
The rest was history in Seattle.
The Big Unit would go 130-74 .with a 3.42 ERA and 2,162 strikeouts during his time with the Mariners.
Langston, on the other hand, bolted Canada prior to the 1990 season and landed with the Angels. As an Expo, the lefty went 12-9 with a 2.39 ERA.