Bad grass fields do impact games in several ways. Below are the main observations from my playing days and recent experiences:
- If one team plays more tiki-taka passing soccer versus the other, their effectiveness is reduced with poor grass conditions.
- If one team plays more physical soccer versus the other, it benefits them because the balls are bouncier and more often out of control, making it easier for the physical team to fight for possession.
- If one team is used to having practices and games on Artificial Turf (AG) versus the other, it harms them more on grass fields, especially bad ones. Many teams from NorCal practice and play mostly on AG fields, so bad grass fields are their worst nightmare.
Of course, this only matters when two teams are closely matched, making a slight difference and benefiting during the match.