The Jurassic Express was set to wrestle the Lucha Bros in the first round of the AEW World Tag Team Tournament. This match still happened, but Marko Stunk substituted for Luchasaurus after he suffered an injury.
It was reported by PW Insider that Luchasaurus was believed to have suffered a hamstring tear. This is much worse than first thought and could keep him out of the ring for months while it heals.
Dave Meltzer later confirmed on Wrestling Observer Radio that Luchasaurus did suffer a hamstring tear.
At this point there is no word about how long Luchasaurus will be out of action, but this is definitely terrible timing.