Ernie Young was a non-roster invitee with the Giants in 1975. There seems to be some resemblance to the photo in KF 250. Can't explain why the pitching pose in KF 249.
Ernest Young Minor Leagues Statistics & History | Baseball-Reference.com
By the way, Merkle, think we have identifications on two of the TBD's you posted earlier. They pertain to KF 197&198 plus 199&200. You'll find the postings on page 1506 of this thread.