Saw a World Series game there in 74. Few years later saw several Concerts there . I imagine it’s a run down dump . Locally there is a 50 year old venue that is crumbling, but the city kicks the can down the road. So it goes.
I also saw one of the World Series games there in 1974. Like you I would take BART there and walk on the overpass over to the stadium. Normally I would pay $2 for a bleacher seat. Some day games were poorly attended (2,000 or so fans).