Steve Selsky was a first baseman who appeared on the White Sox spring roster in 1962. This photo of him was for sale on eBay in 2013 by a vendor named soxphotos.
Yesterday, another player named Steve Selsky made his major league debut with the Cincinnati Reds. I think this may be the older Steve Selsky's son, but my ability to establish the link is a bit tenuous.
An article which mentions the younger Selsky's playing in the Cape Cod League says that his father played in the major leagues. See
Cape Cod Baseball League, the Amateur's Big League | By Skip Rozin - WSJ
Other articles about the Cape Cod League Steve Selsky make clear that he attended the U. of Arizona, so he's definitely the fellow who made his major league debut yesterday.
One more piece of evidence. The father of the new major leaguer is definitely named Steve. An article in the Cincinnati paper mentioned the dad taking his wife to Hawaii as a birthday present. But again, we don't have the direct citation that the father was a minor leaguer.
There have been no previous major leaguers named Selsky, and the older Steve Selsky is the only other pro baseball playing Selsky listed in baseball-reference. Sometimes being placed on a major league roster is conflated with being a major leaguer.
If the older Steve was our new major leaguer's dad, that means that he would have been 43 years old when his son was born. That's not out of the question, but certainly unusual.
Eureka! The proof that they are father and son:
http://www.baseballamerica.com/today...1/2611774.html
Steven Selsky Minor Leagues Statistics & History | Baseball-Reference.com