An undrafted success story, he went from an accomplished decade-long veteran into a brief scouting retirement before launching a highly inspiring, late-career resurgence under head coach Jim Harbaugh. During his early years in the league, Jefferson completely transformed his body to prove he could cover slot receivers. He woke up at 4:00 AM for boxing regimens and underwent a legendary "hell week" diet where his lunch consisted strictly of a customized Caesar salad from the Cheesecake Factory. He jokingly admitted the hardest part of the physical grind was living directly across the street from an In-N-Out Burger, meaning he had to smell fast food while eating boiled eggs and bananas. Nickname “Unc”