The all-grass field stipulation caused the league to skip over several of the country's largest markets, including Houston and Philadelphia, since they lacked a large grass stadium in 2001. In the league's two northernmost markets, Chicago and New York/New Jersey (the latter of which played in Giants Stadium during a brief window in which the stadium's usual artificial turf had been replaced by natural grass), the combination of the all-grass requirement, midwinter playing season and the fact that the XFL followed shortly after the NFL had used both fields for a full season (in Giants Stadium's case, two full seasons, since the Giants and Jets shared the stadium; the Giants also hosted two playoff games following the 2000 season) caused significant damage to the playing fields; at Chicago's Soldier Field, the wear and tear on the field was such that by midseason, the midfield logo of the NFL's Chicago Bears was clearly visible amid a stretch of dirt and dead grass.