O.co Coliseum (originally Oakland–Alameda County Coliseum and commonly known as Oakland Coliseum) is a multi-purpose stadium in Oakland, California which is home to both Major League Baseball's Oakland Athletics and the National Football League's Oakland Raiders, now the only such stadium in the United States; however, that is in jeopardy as the Raiders have filed for relocation to Los Angeles. The Coliseum was also home to some games of the San Jose Earthquakes of Major League Soccer in 2008–2009 and hosted games at the 2009 CONCACAF Gold Cup.
The Coliseum has 6,300 club seats, 2,700 of which are available for Athletics games, 143 luxury suites, 125 of which are available for Athletics games, and a variable seating capacity of 35,067 for baseball, 56,057 for American football and 63,132 for soccer. In seat capacity, O.co Coliseum is the smallest NFL stadium, and the 2nd smallest MLB stadium.
The Oakland–Alameda County Coliseum complex consists of the stadium and the neighboring Oracle Arena.(Wikipedia)