Unidentified rock musician at Sicks' Stadium (earlier spelled as <i>Sick's Stadium</i>), Seattle, Washington, U.S., July 26, 1970.  <a href="https://en.wikipedia.org/wiki/Jimi_Hendrix" class="extiw" title="w:Jimi Hendrix">Jimi Hendrix</a> headlined that show, and it turned out to be his last-ever performance in his home town.  Also on the bill were <a href="https://en.wikipedia.org/wiki/Cactus_(American_band)" class="extiw" title="w:Cactus (American band)">Cactus</a> and <a href="https://en.wikipedia.org/wiki/Cat_Mother_%26_the_All_Night_Newsboys" class="extiw" title="w:Cat Mother &amp; the All Night Newsboys">Cat Mother &amp; the All Night Newsboys</a>. The Seattle Municipal Archives say "One of the opening acts of Jimi Hendrix's Cry of Love Tour performs onstage," but don't identify the performer.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/24256351@N04">Seattle Municipal Archives</a> from Seattle, WA
CC BY 2.0
<bdi><a href="https://en.wikipedia.org/wiki/en:Seattle_Municipal_Archives" class="extiw" title="w:en:Seattle Municipal Archives"><span title="municipal archives of the city of Seattle">Seattle Municipal Archives</span></a>
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