opening acts you are glad you didn't miss

Lynyrd Skynyrd opening for the Doobie Brothers. Actually it was a pretty cool concert all around.
Saxon opening up for Blue Oyster Cult and Black Sabbath (Black & Blue)
That was my first concert- Wheels of Steel!

Kid Rock opening for Aerosmith at the Hollywood Bowl

Kix and Badlands opening for Winger. Maybe this one doesn't count, I was NOT there to see the headliner...

Thin Lizzy opening for Deep Purple at the Greek Theatre

Jerry Cantrell opening for Kid Rock at the Universal Amphitheatre
Kansas before Lynyrd Skynyrd in 1975 in the Rivoli Theater, Indianapolis.

Humble Pie and ELP before Johnny Winter And in the Wabash Gym in Crawfordsville, IN in 1971.

This new band called the Eagles (with original 4 member line-up with Bernie Leadon and Randy Meisner) before Yes in the Indiana State Fairground Colliseum in 1972.