<p>Jackson Field (birdcage) is natural grass… the turf field was used on Wednesday’s game for two reasons… 1) heavy rain was expected, which would turn Jackson into a mudpit and 2) if lightning delayed the game (which it did), Smith has lights to allow night play. the team prefers to play on grass, so barring weather like Wednesday’s, the game on Sunday should be held at Jackson… go Cards!</p>