Brees has a 99.8 QB rating and 66.9 completion % all-time in Playoffs.

BreesusSaves said

I wonder if Brees would have more rings than fingers to wear them if he spent his career with a defense that was top 10 in scoring every season.

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If you put Brees with New England and Brady with the Saints since 2006 (14 year window).

Brees - 6 rings
Brady - 0 rings

If you put Brees on the Broncos team from 2012-2015, he wins 3 rings. Manning limped through the playoffs in 2015 for his only ring during this time.