Ah, National League baseball: The place where the pitchers hit and substitutions are aplenty. A favorite substitution of Cardinals Manager Mike Matheny appears to be the double switch. Because Matheny seems intent on making these switches often, as Cardinals fans, let us familiarize ourselves with the term.
What is a double switch?
The best definition I have found is on Baseball Reference. According to BR:
A double switch is a substitution during which two or more players are substituted simultaneously and take places in the batting order different from those of the player they replaced.