Misawa also worked the ‘86 Crockett Cup as Tiger Mask alongside Baba.
oh good catch, after missing this I went back to Cagematch to figure why, because Tiger Mask is a separate search term; the oldest match listed for Misawa as himself was debut post-unmasking in May 1990. Knowing this I then re-searched NA under Tiger Mask for his time under the mask, and after a little parsing* found just that and his match the next night at the WrestleRock Rumble
*the rabbit hole one finds themselves down, in searching Tiger Mask in NA from 1984 to 1990, I found not only those two matches but also apparently Ken Wayne wrestled under the name of Tiger Mask in Central States Wrestling and Continental in 1984. Alas, GIS indicates he did not borrow any look from Sayama or the actual character when he probably should have. I would not have thought much of this otherwise though were there not an odd one-off match listed for Central States again in Feb 1989 where CM's link oddly goes to Misawa's name instead. Originally seeing that, the combo of the earlier association between CSW and Wayne plus the idea of Baba sending Misawa over for such a match had me hitting the "doubt" button hard... then I saw
@tekcop's very relevant remark above and had a good laugh