PAN's Adrián Rivera is on a distant third, in large part due to the very lackluster rule of PAN's Marco Antonio Adame Castillo of the state since 2006.
Morelos, land of Zapata - how fitting for the leftwing PRD.
Here's a (poor quality) graphic from the newspaper:
Empatados, PRI y PRD en Morelos. El Universal, May 24, 2012.