Negatory! I and others have seen one on the coast of Oregon within the last 10 years. It was a very large dark cat 1/3 to 1/2 again as large as any cougar I have ever seen. Including tail in length, it was as long as one lane of the two way road I was driving on. It was crossing the Siletz Hwy by the truck scale area between Siletz and Toledo. I repeat that I am not the only person to have seen the big cat and can give another witnesses name.
The Federal Jaguar Eradication Program was started in the early 1900s at the request of farmers and cattlemen. It continued until the early 1950s at which time the number of bounties paid dwindled to the zero and the program was ended. It is highly possible and probable that a few of the big cats remained and that may be what you saw.