ESPN publishes no stat lines for George Blanda. His career totals, as Wikipedia gives them: 26,920 passing yards, 236 passing touchdowns, 4,007 completions, 277 interceptions thrown, 47.7 completion %, 60.6 passer rating.
Among the 2,594 NFL players with a career line on file, regular season. A place deeper than 300th is not listed.