Greason (b. 1924) played in the Negro Leagues in 1948 for the Birmingham Black Barons and in the Majors in 1954 for the Cardinals. He had a career record of 3-3 (including his Negro League stats) with 36 strike outs and a 5.15 ERA.
I mailed to Greason on May 10 and got the cards back signed on May 25, for a 15-day TAT. He also signed my note.