He had 5 post-merger seasons where he threw enough passes to officially qualify for efficiency stats.
1970 - 21st in comp. %, 9th in YPA, 27th in INT%, 27th in rating out of 31 passers
1972 - 18th in comp. %, 2nd in YPA, 23rd in INT%, 12th in rating out of 27 passers
1974 - 15th in comp. %, 8th in YPA, 24th in INT%, 12th in rating out of 32 passers
1975 - 25th in comp. %, 18th in YPA, 30th in INT%, 27th in rating out of 30 passers
1976 - 20th in comp. %, 30th in YPA, 29th in INT%, 29th in rating out of 31 passers
That's not HOF material there. I understand why he's in. The AFL part of his career was much better, and of course everything surrounding SB III.