This is merely a guess based on 1) a surname starting with Li... 2) KC 941 is in a pitcher's pose, and 3) the era of the Pirates' uniform in the two photos. Raymond M. "Mason" Lilley was a pitcher who was a non-roster invitee with the Pirates in 1972. The only photo I've found of him is the attached fuzzy one showing him as a Little League coach in North Carolina 26 years after his spring appearance with the Pirates. I can see some resemblance between the two, but it's difficult to verify.
Raymond Lilley Register Statistics & History | Baseball-Reference.com