The NFL's Raiders have just two regular season games remaining at RingCentral Coliseum, commonly known as Oakland-Alameda County Coliseum. The franchise will move to Las Vegas, effectively closing the era of shared MLB and NFL facilities.
The term "multi-purpose" brings back memories of the 70s and 80s, with "cookie cutter" types including Busch Memorial Stadium, Riverfront, Three Rivers and The Vet. However, historic baseball grounds such as Fenway Park, Tiger Stadium, Wrigley Field and Yankee Stadium were all home to football at one point.
We believe the actual peak was 1971, as 18 of 24 MLB franchises shared home turf with their NFL counterparts. 1971 saw the opening of Veterans Stadium and the 49ers moving to Candlestick Park. It also marked the final year of shared facilities in Kansas City and Washington, D.C.
Multi-purpose MLB and NFL venues in 1971 included:
Atlanta Fulton-County Stadium
Baltimore's Memorial Stadium
Cincinnati's Riverfront Stadium (opened 1970)
Cleveland Municipal Stadium
Detroit's Tiger Stadium
Houston's Astrodome (the Astros, Oilers and NBA's Rockets all played here from 1971-75)
Kansas City's Municipal Stadium (1971 was final shared year, football's Arrowhead opened in 1972 and Royals Stadium opened in 1973)
Milwaukee County Stadium (we'll count it as the Packers were playing here part-time when the Brewers opened play in 1970)
Minnesota's Metropolitan Stadium
New York's Shea Stadium (shared with Jets)
New York's Yankee Stadium (shared with NFL's Giants)
Oakland Alameda Coliseum
Philadelphia's Veterans Stadium (opened 1971)
Pittsburgh's Three Rivers Stadium (opened 1970)
St. Louis' Busch Memorial Stadium
San Diego's Jack Murphy Stadium
San Francisco's Candlestick Park (first shared in 1971)
Washington's RFK Memorial Stadium (Senators left Washington after 1971)
Oakland's Coliseum is the only venue of the 18 from 1971 that hosted either MLB or NFL games in 2019. That fact will stand in 2020, though it will be solely baseball.