This study explores the (predictably significant) relationships between both projected win percentages (as per ESPN and FiveThirtyEight) and listed odds, available at the time of betting (per OddsPortal.com), and the success rate of NFL betting slips over the past five seasons (2015-16 to 2019-20) and how that relationship can be applied (in nominal terms) to increase the actual returns accumulated on aforementioned betting slips to produce returns that rival those achievable via passive investment in the stock market.