Does anyone know how a simulated game works? What exactly happens?
From:
http://www.slate.com/id/2121262/It's an informal scrimmage that allows an injured pitcher to test his arm. Simulated games take place at the stadium, with two or three hitters taking turns in live at-bats against a pair of pitchers. (It may happen that both pitchers are recovering from injuries, but most of the time a healthy teammate or coach is recruited for the exercise.) There are rarely any players out in the field, and there's no umpire behind home plate. Either the bullpen catcher or the pitching coach will call balls and strikes and determine what "happens" when one of the hitters puts the ball in play. If it's a hard line drive, they might say it's a "hit"; a weak grounder would be deemed an "out."
