The closest with a baseball team would be San Diego, California. Its local team is the San Diego Padres.
The closest major city to Cuba in Mexico is Cancun.
The southernmost city (and thus the closest city to the equator) in Mexico is Tapachula, Chiapas.
The San Diego Padres are the closest MLB team to Mexico, 10 miles (16 kilometers) away from the US-Mexico border.
San Diego Padres
The city of Toluca (pop: 1,610,786) is 56 kilometers (35 miles) east of Mexico City.
The Mexico City International Airport qualifies as such -- it lies within the city limits.
Tapachula is a city that is located in the state of Chiapas in Mexico. This is the closest city in Mexico to the Equator.
San diego padres