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The Texans and Raiders will make a historic trip in Week 11, heading to Mexico City for a Monday Night Football game on foreign soil. It will be the first NFL regular-season game in Mexico since 2005, and the league is taking precautions to ensure that players remain safe while across the border.

The NFL sent a memo, obtained by the Associated Press, to both the Texans and the Raiders instructing the two teams not to leave the hotel or to order room service.

Specifically, one section of the memo was entitled "safety" and a note that said "DO NOT leave the hotel." The memo also instructed players to leave all "expensive jewelry at home" and not to carry big amounts of cash and/or use ATMs while on the trip to Mexico.

In general, this is a pretty smart move while traveling abroad. Take a ton of cash into a place you're not familiar with, and you could be a target as a tourist. NFL players are pretty wealthy people, and leaving the hotel could make them potential targets for people interested in acquiring that wealth through illicit means.

On the food front, the memo had a "health and performance" section that said to not drink the water in the country -- just bottled water -- and to "eat all meals in the meal room. DO NOT order room service" and "DO NOT eat outside of the team meal room."

This almost certainly relates to a previous issue the NFL had with contaminated meat causing positive tests for performance-enhancing substances.

In May, the league warned players that eating contaminated meat in foreign countries could potentially lead to a positive test for clenbutrol.

So this trip to Mexico City for the Texans and Raiders doesn't really have a full-blown vacation factor to it at this point.

On the other hand, there's a decent bet the two teams have an OK hotel down there. Also, as pointed out by colleague Sean Wagner-McGough, there are plenty of delectable meat-free options available.