Nash, shown in camp with the Phillies in 1966, was a power-hitting outfielder who never overcame a series of injuries.
Robert Nash Minor Leagues Statistics & History | Baseball-Reference.com
The Mets not only selected him out of the Red Sox system after the 1964 season but showed him in their '65 yearbook. And Nash's own website claims he was a major league player who spent all of that season on the Mets' roster (although I can't find independent confirmation of that, it's notable that he was neither returned to Boston nor lost on waivers, so technically he might be right - a man who spent a full major league season on his team's disabled list, without ever getting into an MLB game).