In 1992, Pettitte pitched for the Greensboro Hornets of the Class A (baseball) South Atlantic League. He pitched to a 10-4 Win-loss record (pitching) and a 2.20 earned run average (ERA), with 130 strikeouts and 55 base on balls, in 27 games started. That season, Pettitte and Posada first played with Derek Jeter. Pettitte pitched for the Prince William Cannons of the Class A-Advanced Carolina League in the 1993 season, finishing the year with an 11-9 record, a 3.04 ERA, 129 strikeouts, and 47 walks in 26 starts. He also made one start for the Albany-Colonie Yankees of the Class AA Eastern League (baseball) during the season. Pettitte began the 1994 season with Albany-Colonie, where he had a 7-2 record and 2.71 ERA in 11 starts, before receiving a promotion to the Columbus Clippers of the Triple-A (baseball) International League. With Columbus, Pettitte had a 7-2 record and a 2.98 ERA in 16 starts. The Yankees named him their minor league pitcher of the year.

How many minor league teams did Pettitte pitch for between 1992 and 1994?
4