In honor of Wrigley's anniversary, Associated Press photographer Kiichiro Sato was allowed to climb the steel ladder through the steel floor for a rare behind-the-scenes visit. Juding from the photos, little has changed in the past 100 years.
ABOVE: Scoreboard operators Brian Helmus, left, and Fred Washington look out at the field from inside the iconic scoreboard at Wrigley Field during a game on April 10.
. Scoreboard operator Darryl Wilson keeps up with the game as he watches from inside the scoreboard on April 10. Wilson mans the two top floors of the three-level scoreboard, tracking scores from around baseball and changing scores and the uniform numbers of pitchers as managers in those games bring in relievers.
. Scoreboard operator Brian Helmus changes scores from inside the board.
. The Cubs play the Pittsburgh Pirates in this view of the field from inside the board.
. Darryl Wilson uses a pen and paper to keep up with games inside the scoreboard.
. Fans sit beneath the scoreboard at Wrigley Field in 2011.