who found it to be a revenue measure, despite the fact that the city had made the measure immediately effective "due to danger to the public peace, health, and safety of the City of Berkeley as a result of the holding of professional sports events there". The stadium was not well maintained for most of the late 1970s. Its condition was most noticeable during baseball season, when crowds for A's games twice numbered fewer than 1,000. On April 17, 1979, only 653 fans attended the game versus the Seattle Mariners. During this time, it was popularly known as the "Oakland Mausoleum". 1980s In 1980, the Raiders won Super Bowl XV. Two years later, the Raiders moved to Los Angeles, leaving the A's as the only remaining tenants of Oakland Coliseum. Only days later, Finley agreed to sell the A's to Marvin Davis, who planned to move the A's to Denver. However, city and county officials were not about to lose Oakland's status as a major league city in its own right, and refused to let the A's out of their lease. Finley sold the team instead to the owners of San Francisco-based Levi Strauss & Co. After the 1986 Major League Baseball season, the original scoreboards were replaced. A new American Sign and Indicator scoreboard and message center was installed behind the left field bleachers, while the original right field scoreboard was replaced with a manually operated out-of-town scoreboard. Between the centerfield flagpoles, a new Diamond Vision video screen was installed. The 1987 Major League Baseball All-Star Game was held at the stadium. From 1988 to 1990, the venue saw three more World Series. In 1989, the Athletics won their 4th Series since moving to Oakland, sweeping the San Francisco Giants in the earthquake-interrupted "Battle of the Bay" Series. 1990s In July 1995, the Raiders agreed to return to Oakland provided that Oakland Coliseum underwent renovations. In November 1995, those renovations commenced and continued through the next summer until the beginning of the 1996 football season (more info below). The new layout also had the somewhat peculiar effect of creating an inward jog in the outfield fence, in left center and right center. There are now three distance markers instead of one, at various points of the power alleys, as indicated in the dimensions grid. The Raiders' return also heralded the creation of the "Black Hole", a highly recognizable group