The spectator experience has become a critical part of stadium design in recent years. Camden Yards in Baltimore and Jacobs Field in Cleveland are shining examples of spectator stadiums. Part of this experience is the natural grass. Even more importantly, natural grass offers a safer playing surface for athletes. Natural turf is usually softer than artificial turf and protects joints and muscles from damage.
Natural turf is softer and offers more give than artificial turf.
When a player turns quickly, their cleats tear at the turf. If the strain is too great, the turf gives way. This feature is much like a shear pin protecting a motor on a piece of equipment. Natural turf has many benefits but requires high light levels for good growth. Artificial turf has thus been the only choice for domed stadiums.