1990 – Major league umpires announce that they will boycott exhibition games to protest not having been consulted in the revision of the regular season schedule after the lockout. They will return to work on April 1st.
On March 22, 1990 — 1990 – Major league umpires announce that they will boycott exhibition games to protest not having been consulted in the revision of the regular season schedule after the lockout. They will return to work on April 1st.
Sources –
Baseball Reference March 22
SABR Games Project
National Pastime March 22
Retro Sheet
Replay The Game