1950s radio baseball game recreation audio tape.  In the early 1950s
the announcer Marty Glickman recreated baseball games for a radio
audience on AM station WMGM in New York.  The games, complete with
sound effects (bat hitting ball, crowd noises) were condensed to about
ten minutes. How can I obtain a tape at a reasonable price for a
Yankee-Redsox or Dodger game from that time period? Who is the current
copyright owner of such tapes?

Please note that I had this question listed at $15 with no takers;
evidently it is not easy to find the answer. I am raising the offered
price to justify the additional time that apparently must be invested.

This is no answer but relates to the radio practice of recreating
baseball games on radio  - at an even earlier time.  Maybe it is a
story from Ronald Reagan, but that doesn't make it any better or
worse.
In those days of only local broadcasting, the commentators got
constant teletype progress reports on distant games and carried on a
running report as though they were on the scene.  In one game, the
teletype connection failed, and the reporter had to continue, knowing
the line up of batters and making a couple of reasonable guesses on
runs made - he had to make it sound interesting.  But then when the
teletype started again, the score had gone the other way, and he had
to manage to cover his mistake while trying to pick up on the actual
commentary.

Thanks, myoarin-ga; that is a great historical note.  I would love to
hear such a game!

Sorry, I can't help you on that. It was probably before recording of
radio programs, maybe before record equipment other than on shellac. 
Anyone remember "wire recorders"?
They didn't come in until the 1940s.