Patrick Willis retirement came at right time for post-career pursuits
Got a debate going on right now about who to take if you had to choose one of these two. Who you taking? : r/49ers
Luke Kuechly Joins Esteemed Company As an NFL Star Who Retired Young - The Ringer
10 Athletes Who Retired in Their Prime
Chris Borland retires from NFL at just 24 years old, makes his own sense of head injuries – New York Daily News
Patrick Willis Explains Decision to Retire from NFL
Why did Luke Kuechly retire? Panthers star explains his decision to end NFL career
Patrick Willis retiring after eight seasons with 49ers
Patrick Willis Retired in His Prime, But Where is He Now? - FanBuzz
PFF All-Decade Top 101: The best NFL players from the 2010s, NFL News, Rankings and Statistics
Jones-Drew, Locker, Willis, Worilds may signal start of a trend of young NFL players retiring