Conversation so far:
When did Reggie Jackson join the minor leagues?
Reggie Jackson joined the minor leages in 1966
who did Reggie Jackson play for?
Reggie Jackson played for the Kansas City Athletics
did Reggie Jackson set any records?
In 27 World Series games, Reggie Jackson amassed 10 home runs, including a record five during the 1977 Series, 24 RBI and a .357 batting average.
Was Reggie Jackson ever injured?
On June 5, outfielder Billy North and Reggie Jackson engaged in a clubhouse fight at Detroit's Tiger Stadium. Jackson injured his shoulder.

Question: When did he leave the minor league?
Self-contained rewrite: When did Reggie Jackson leave the minor league?