There are 10 official ballparks in the Cactus League, where half of the teams that make up MLB play every spring in the Valley of the Sun. Do you know which one is the oldest? How about the newest?

PHOENIX (AZFamily) — While spring training is over and baseball season is underway, the Cactus League saw another significant growth in fan attendance this year at ballparks across the Valley.

PHOENIX — The number of baseball fans flocking to the Valley for spring training continues to go up, according to Cactus League officials. Nearly 1.7 million fans went to Arizona spring training ...

A star-studded Los Angeles Dodgers lineup and strong support from Chicago Cubs fans  helped Cactus League attendance rise for the fourth straight season. Just ...