Thanks 69Stang and good research.WOW, super cars MCM! You know, it's a shame that I am not a baseball fan, because I live for stats and history. The moment I saw your pics, I wanted to know about the cars themself. So thanks for not only great photos of these wonderful cars, but a good excuse to spend a little time researching!
The second one is easy... The #5 Giesse is from the 1998 24 Hours of Le Mans. This chasse (#022) is one of the Michelotto built 333's (the first 15 were built by Dallara). This car started 5th on the field and qualified first in the LMP1 class, but was listed as a DNF with a 33td place finish (33 of 47).
Though it did not finish Le Mans, this car did post several outstanding wins in 1998. Cassie 022 made an appearance at the Le Mans practice in February of 1999, but did not race in that years event.
Info on the #30 in a moment...