The last teams to come into MLB are now 23 seasons old (1998 the Rays and D'Backs). For 60 years there were only 16 teams in MLB. After the Dodgers and Giants moved in 1958, expansion really began to take off in 1961 with the Los Angeles Angels and another incarnation of the Washington Senators when the previous Senators team moved to Minnesota to become the Twins.
With franchise valuations continuing to increase it's highly likely that baseball will further expand both domestically and internationally? Where it goes next is still anyone's guess. We track the history of MLB expansion in under 30 minutes.
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