On March 28, 1990 — 1990 – A plan to allow starting pitchers to earn victories with only three innings pitched (because of the abbreviated spring training period) is scrapped, but teams will be allowed to open the regular season with 27-man rosters instead of the allowed maximum of 25.

Sources –
Baseball Reference March 28
SABR Games Project
National Pastime March 28
Retro Sheet
Replay The Game

Own this Day and Be Part of Baseball History