My Mother has an autograph book with most the cast from this movie, but two names do not show up anywhere. One appears to be Ray Parker and the other Mike Cortez or Cortey, Carty Catey.
Any guesses if they were part of the crew? She got these while working at the Hotel Thayer where the cast stayed during filming.

Here's what IMDb lists for cast and crew

The Long Gray Line (1955) - Full Cast & Crew - IMDb (http://www.imdb.com/title/tt0048312/fullcredits?ref_=tt_ov_st_sm)