Conversation so far:
Did Joe McGinnity have a special pitching technique in his career?
During this time as a semi-pro, McGinnity developed a sidearm pitch he nicknamed Old Sal, described as a slow curve.
What team did Joe McGinnity play for after the Giants?
McGinnity purchased the Newark Indians of the Class-A Eastern League for $50,000
What was Joe McGinnity's record with the Newark Indians?
That season, he had a 29–16 record.
Did Joe McGinnity stay with the Newark Indians?
McGinnity sold his interests in the Indians to Ebbets and Ed McKeever and purchased the Tacoma Tigers of the Class-B Northwestern League for $8,500

Question: Where did he go next?
Self-contained rewrite: Where did Joe McGinnity go next after the Newark Indians?