Job-seekers may believe that an Ivy League degree or Fortune 500 work experience will land them a gig—but who they thank while walking into an interview could be more important than their professional pedigree.

Twilio CEO Khozema Shipchandler starts checking his emails at 4:30 a.m, is on the job until 9 p.m. and runs laps around the house to blow off steam in between. “The gap that I allow for me to not think about work is six to eight hours on Saturdays,” the Gen X boss tells Fortune.

Tom Brady played in more than 300 NFL games over a 23-year career. Seven ended with a Super Bowl ring—more than any player in league history—cementing his place as one of football’s greatest quarterbacks.