And before free agency, teams had two ways to improve.
1. Trade, which requires another team to agree
2. Bring up rookies
And while Baltimore stood pat, the rest of the American League had these same limitations.
These limitations were a big factor in why so many teams had massive World Series droughts prior to free agency. The Red Sox and the Cubs were the two most famous ones, but the White Sox, Phillies, Senators/Twins, Guardians, and a few others had the same problems. The Reds, too. Probably more...