I got to see Springsteen for free on 9/8/73. See the description below. He only had one album out and Pitt had him on a bill in a nearby park. The set was short – maybe 30-40 minutes. I remember that Buzzy Linhart played but didn’t recall the other act.
Here are two descriptions with a setlist.
https://www.brucespringsteen.it/DB/mn.aspx?ex=197309081
http://brucebase.wikidot.com/gig:1973-09-08-flagstaff-hill-pittsburgh-pa
Sad! 