In June 1989 Kezar Stadium was demolished and rebuilt with a much smaller seating capacity of 10,000. The upgrades included an eight-lane, all-weather track and a large grass athletic field suitable for soccer, football and lacrosse.[1]
The field and track configurations remained the same. A replica of the original concrete arch bearing the name "Kezar Stadium" was built on the west side of the stadium as a tribute to the original structure.
http://en.wikipedia.org/wiki/Kezar_Stadium