I was at that concert and LS put on quite a performance. It was one of the “Day on the Green” concerts at Oakland Stadium that Bill Graham used to put on several times a year for a number of years. Loads of great music and fun and dirt cheap admission with open seating in the bleachers or standing room on the field.
The first one I attended was in 1975 - Chicago, Beach Boys, New Riders of the Purple Sage, Commander Cody & His Lost Planet Airmen (May 1975). IIRC AC/DC was pretty much unheard of in the states but they were the opening act and we about died laughing at Angus in his school boy garb doing his kick shuffle across the stage.
I attended one in 1976 - that starred The Who and the Grateful Dead (October 1976). I was completely wasted before the gates even opened so I remember very very little about that concert except that the red stamps were killers.
In 1977 I went to the one in your post that had - Peter Frampton, Lynyrd Skynyrd, The Marshall Tucker Band, Santana, The Outlaws (July 1977). Great high energy concert all day long.
The last Day in the Green concert I attended was in 1978 - The Beach Boys, Linda Ronstadt, Elvin Bishop, Dolly Parton and Norton Buffalo (May 1978). It was a fairly laid back concert, the girl I took ended up being pretty much a flash in the pan (I think she just wanted a free ticket to the show) but afterwards it ended up being a heck of a night, I didn’t get to work until about noon the next day.
Got married soon after that to my first (crazy) wife, so the concert going pretty much went on hold until we divorced 5 years later. I really miss those Day on the Green Concerts, I’d imagine Chucky and JIO and a few others here attended some of them as well.