Peter Thiel & Garry Kasparov
chessbase.com
chessbase.com
Here is his US Chess rating history:
http://main.uschess.org/datapage/ratings_graph.php?memid=120...
Seriously, though, from what I can tell, Thiel is rated 2199[1], which isn't Master level. That's still enough to be the 21,246th best player in the world.
http://main.uschess.org/assets/msa_joomla/MbrDtlMain.php?120...
(As a U.S. resident, he probably hasn't had much exposure to FIDE-rated events... and in fact his FIDE profile says only 10 games)