the concept of spring training is not limited to north america; the japanese professional baseball leagues' teams adopted spring training and preseason game sites across east asia such as south korea, the philippines, and taiwan; the pacific islands (most notably in hawaii); and two cities in the united states: salinas, california and yuma, arizona on the mexican border. in 2015, 2016 and 2019, mlb has hosted spring training games in mexico. in 2015, the arizona diamondbacks played against the colorado rockies at estadio sonora, hermosillo. a year later, the san diego padres hosted the houston astros at estadio fray nano in mexico city. finally in 2019, the diamondbacks once again played the rockies but this time, at estadio de beisbol monterrey in monterrey.