[Answer] When Dan Marino's jersey number 13 was retired by the Dolphins in 2000, what was the only jersey number previously retired by the team?

Step 1 : Introduction to the question "When Dan Marino's jersey number 13 was retired by the Dolphins in 2000, what was the only jersey number previously retired by the team?"

...Hint :Super Bowl

[Answer] This retired Supreme Court justice died earlier this week at age 99.

Step 1 : Introduction to the question "This retired Supreme Court justice died earlier this week at age 99."

...Justice John Paul Stevens was nominated to the Supreme Court by Republican President Gerald Ford in 1975 in the wake of Watergate and stepped down almost 35 years later as a leader for the liberal side of the bench. John Paul Stevens

[Answer] 4. I retired from the sport of cycling after winning 7 straight Tour de France championships. Who am I?

Step 1 : Introduction to the question "4. I retired from the sport of cycling after winning 7 straight Tour de France championships. Who am I?"

...1. Lance Armstrong 2. Miguel Indurain 3. Floyd Landis 4. Greg LeMond Lance Armstrong won his 7 straight Tour de France championships after defeating advanced testicular cancer. He started the Lance Armstrong Foundation for cancer victims, an organization that sells the "Livestrong" braclets.

[Ans] Whose number has been retired by every team in the NHL?

Step 1 : Introduction to the question "Whose number has been retired by every team in the NHL?"

Wayne Gretzky is the leading scorer in NHL history, with more goals and assists than any other player. Nicknamed "The Great One", he has been called "the greatest hockey player ever” by many sportswriters, players, and the league itself. After his retirement in 1999, Gretzky was immediately inducted into the Hockey Hall of Fame. He holds 61 NHL records: 40 regular season records, 15 playoff records, and six All-Star records. The NHL retired his jersey number 99 league-wide, making him the only player to receive such an honor.