The significant career records he does not hold already:

PASSING YARDS
1 Dan Marino 61,361
2 Brett Favre 53,615 (needs 7,746 yds to tie)
3 John Elway 51,475

TD PASSES
1 Dan Marino 420
2 Brett Favre 396 (needs 24 TDs to tie)
3 Fran Tarkenton 342

PASSING ATTEMPTS
1 Dan Marino 8,358
2 Brett Favre 7,574 (needs 784 attempts to tie)
3 John Elway 7,250


COMPLETIONS
1 Dan Marino 4,967
2 Brett Favre 4,678 (needs 289 completions to tie)
3 John Elway 4,123

VICTORIES AS STARTING QUARTERBACK
1 John Elway 148
2 Dan Marino 147
3 Brett Favre 139 (needs 9 wins to tie)

Two more seasons and he would hold them all, except maybe total yards passing. That one is a bit "ify" even for 2 more seasons, although in 2004-2005 he has had 7,969 yards, enough to get it. Had he won a few more games and thrown just a few more TD passes last year, and he very likely would get the victories, TD passes and completions records in 2006 if he plays. The completions record could be his in 2006, he has never had fewer than 300 as a Packer.