That is, they stand next to a base in anticipation of receiving the ball thrown from another fielder, so that they may make a play on an opposing baserunner who is approaching that base.
In general, the first baseman covers first base, the second baseman or shortstop covers second, the third baseman covers third, and the catcher covers home base.
In American English, the expression "cover your bases" used outside of a baseball setting means to be thoroughly prepared for something.
According to the Congressional Research Service (CRS) report, “Military Base Closure: Socioeconomic Impacts,” the closing of a military base may have a similar effect on a community as the closing of an industrial facility such as a steel mill or oil refinery.
According to the CRS report, once a base has been scheduled for closing, time is of the essence.
Day says that if electrical contractors really want to be a part of the base redevelopment projects, they should pay attention to their city government's notices.