Conversation so far:
How many minor league teams are there in baseball?
There are 256 minor league teams.
What are the minor leagues in baseball?
A hierarchy of professional baseball leagues in the Americas that compete at levels below (MLB) and provide opportunities for player development and a way to prepare for the major leagues.
How did Casey Stengel do in the minor leagues?
Casey Stengel had a .251 batting average with Kankakee when the league folded in July.

Question: Which team did he get signed to first?
Self-contained rewrite: Which team did Casey Stengel get signed to first?