GLENDALE, Ariz. – A team full of Mexican citizens and Mexican-Americans played a baseball game here Wednesday. This would be of little note in 49 other states. In Arizona, where immigration has been politicized to the point of dystopian fiction, this was a recipe for jokes about how many of the team's players were asked for their papers on the way to the stadium. It might've been funny if not for the fact that a police officer really had stopped one. "I actually got pulled over today on the way to the field," said Marco Estrada, a Milwaukee Brewers pitcher who has lived in the United States for 24 years, whose wife and children are American citizens and who is representing Team Mexico in the World Baseball Classic. Apparently he had run a stoplight. The cop didn't demand he furnish any documents.