Conversation so far:
When did Ken Strong sign with the New York Giants?
In 1933
How long was Ken Strong with the New York Giants after he signed in 1933?
1933 to1935. 1939 and 1944 to 1947
What position did Ken Strong play with the New York Giants from 1933 to 1935; 1939 and 1944 to 1947?
fullback

Question: Was he a key player?
Self-contained rewrite: Was Ken Strong  a key player with the New York Giants as a fullback?