Question: The NFL Top 100 Players of 2013 was the third season of the series, it ended with reigning MVP Adrian Peterson being ranked which  #?

Context articles: NFL Top 100 Players of 2014
NFL Top 100
NFL Top 100 Players of 2011
FIDE world rankings
NFL Top 100 Players of 2013
NFL Top 100 Players of 2017
Adrian Peterson
NFL Top 100 Players of 2012
NFL Top 100 Players of 2016
NFL Top 100 Players of 2015

The NFL Top 100 Players of 2014 was the fourth season in the series.
 It ended with reigning MVP Peyton Manning being ranked #1, while Super Bowl MVP Malcolm Smith is not ranked on this years top 100.
The NFL Top 100 is an annual list that features the top one hundred players in the National Football League (NFL), as chosen by fellow NFL players.
 The rankings are based on an off-season poll organized by the NFL, whereby players vote on their peers based on their projected performance for the next NFL season.
 Only players that will be active in the next season are eligible for consideration.
 In the seven-year history of the countdown, only Tom Brady has been voted No. 1 multiple times (2011, 2017).
The NFL Top 100 Players of 2011 was the first season of the series.
 It ended with reigning MVP Tom Brady being ranked #1, while Super Bowl MVP Aaron Rodgers was ranked #11.
The "Fédération Internationale des Échecs" (FIDE) is the organization that governs international chess competition.
 Each month, FIDE publishes the lists "Top 100 Players", "Top 100 Women", "Top 100 Juniors" and "Top 100 Girls", as well as rankings of countries according to the average rating of their top 10 players and top 10 female players.
 The Elo rating system is used.
The NFL Top 100 Players of 2013 was the third season of the series.
 It ended with reigning MVP Adrian Peterson being ranked #1, while Super Bowl MVP Joe Flacco is ranked #19.
The NFL Top 100 Players of 2017 was the seventh season in the series.
 It ended with reigning Super Bowl MVP Tom Brady being ranked #1.
 This made Brady the first player to be voted #1 more than once.
 It was also just the second time the #1 ranked player was not the reigning MVP of the league, as Matt Ryan came in at #10.
Adrian Lewis Peterson (born March 21, 1985) is an American football running back for the New Orleans Saints of the National Football League (NFL).
 He played college football at Oklahoma and was drafted by the Minnesota Vikings seventh overall in the 2007 NFL Draft.
 Peterson set the NCAA freshman rushing record with 1,925 yards as a true freshman during the 2004 season.
 As a unanimous first-team All-American, he became the first freshman to finish as the runner-up in the Heisman Trophy balloting.
 Peterson finished his college football career as the Sooners' third all-time leading rusher.
The NFL Top 100 Players of 2012 was the second season of the series.
 It ended with reigning MVP Aaron Rodgers being ranked #1, while Super Bowl MVP Eli Manning is ranked #31.
The NFL Top 100 Players of 2016 was the sixth season in the series.
 It aired on May 4, 2016.
 It ended with reigning MVP Cam Newton being ranked #1, while Super Bowl MVP Von Miller is ranked #15.
The NFL Top 100 Players of 2015 was the fifth season in the series.
 It ended with reigning defensive player of the year J.J. Watt being ranked #1 thus marking the first year the reigning MVP Aaron Rodgers is not ranked #1 but ranked #2, while Super Bowl MVP Tom Brady is ranked #3.