By Tobias Carroll Over the course of his 22 years in the NFL, Tom Brady has set a copious number of records and has established a new benchmark for fitness and longevity, sustaining a career at the top of the game for an amount of time many believed impossible. That long career may have reached its end, however. On Saturday afternoon, ESPN reporter Adam Schefter tweeted out the news that “multiple sources” had informed him that Brady would be retiring from the game. The full report, from Schefter and Jeff Darlington, offers some insights into what informed Brady’s decision — something that had…