homers of Babe Ruth's career on May 25, 1935 and Bill Mazeroski's championship-winning blast in Game 7 of the 1960 World Series. The park also hosted football games for the Pittsburgh Steelers and University of Pittsburgh "Pitt" Panthers. Located in a sparsely populated area of the city when it opened in 1909, by the 1960s Forbes Field was surrounded by the University of Pittsburgh campus. The Pirates left the ballpark midway through the 1970 season and the stadium was demolished the following year. Sections of the outfield wall remain standing along Roberto Clemente Drive, and the home plate used in the stadium's final game remains preserved in the University of Pittsburgh's Posvar Hall. The Pirates moved into the multipurpose Three Rivers Stadium in 1970, which they shared with the Steelers. Like other multi-purpose stadiums popular at the time, Three Rivers featured extensive box seats, a turf playing field, and moveable seating sections to accommodate both football and baseball. Three Rivers ended up being much better suited for the former than the latter, and the Pirates struggled to draw fans despite their on-field success in the 1970s. By the 1990s, the Pirates were threatening to leave Pittsburgh unless a new, baseball-only stadium was constructed. The Pirates played their final game at Three Rivers on October 1, 2000, and the stadium was demolished the following winter. The site is currently occupied by parking lots and Stage AE, although one of the stadium's entrance markers remains standing near Heinz Field. In 2012, members of the Society for American Baseball Research marked and painted the home plate and first base of the former stadium on the 40th Anniversary of Roberto Clemente's 3,000th hit. Spring Training Since 1969, the Pirates have held Spring Training at LECOM Park in Bradenton, Florida, which is also used for the Pirates' minor league team, the Bradenton Marauders. Constructed in 1923, LECOM Park is the oldest stadium still in use for Spring Training and the second-oldest minor league park, behind only Jackie Robinson Ballpark in Daytona Beach, which dates to 1914. It is also the third oldest stadium currently used by a major league team after Fenway Park, built in 1912, and Wrigley Field, built in 1914. Built in a Florida Spanish Mission style, LECOM Park underwent two major renovations in 1993 and 2008, the latter of which added lights. The park was formerly named "McKechnie Field," for Bradenton resident