Question: When does the American football running back born who was featured in Minnesota Vikings eighth-generation versions?
Context: Ivory Lee Brown (born August 17, 1969) is a former professional American football running back in the National Football League and World League of American Football.  He played for the Phoenix Cardinals of the NFL and the San Antonio Riders of the WLAF.  Brown is the uncle of Minnesota Vikings running back Adrian Peterson. 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. Albert Young (born February 25, 1985) is a former American football running back who played for two seasons in the National Football League (NFL).  After playing college football for the Iowa Hawkeyes, he was signed by the Minnesota Vikings as an undrafted free agent in 2008.  He played for the Vikings in 2009 and 2010, before agreeing to become an assistant coach for the University of Colorado Buffaloes football team in 2012. Rickey Young (born December 7, 1953 in Mobile, Alabama) is a former American football running back who played nine seasons in the NFL.  Young played college football at Jackson State and was a teammate of Walter Payton.  Rickey was drafted in 1975 (7th round, 164th overall pick) by the San Diego Chargers.  After playing three years for the Chargers (1975–1977) he was traded to the Minnesota Vikings for All-Pro guard Ed White.  In his first season with the Vikings (1978) he led the NFL with 88 receptions, breaking Chuck Foreman's record for receptions by a running back in a season.  He played in six seasons with the Vikings, but retired after seeing limited action in 1982 and 1983.  He retired with 1,011 rushes for 3,666 yards and 23 touchdowns, along with 408 catches (then an NFL record for running backs) for 3,285 and 16 touchdowns. Madden NFL 25 is an American football sports video game based on the National Football League and published by EA Sports.  It was released for PlayStation 3 and Xbox 360 in August 2013.  Instead of numbering it "Madden NFL 14" with the year like in previous versions, the "25" in the title refers to the 25th anniversary of the "Madden NFL" series.  The eighth-generation console versions of "Madden NFL 25" are the very first games to run on EA Sports's Ignite game engine.  However, the seventh generation versions still run on EA's previous game engine, Impact.  The seventh-generation versions featured former Detroit Lions running back Barry Sanders on the cover, while the eighth-generation versions featured Minnesota Vikings running back Adrian Peterson, and were released as launch titles for the PlayStation 4 and Xbox One in November 2013. Mark Peter Kellar (born July 17, 1952) is a former American football running back who played three seasons with the Minnesota Vikings of the National Football League (NFL).  He was drafted by the Vikings in the sixth round of the 1974 NFL Draft.  He played college football at Northern Illinois University and attended Irving Crown High School in Carpentersville, Illinois.  Kellar was also a member of the Chicago Fire, Chicago Winds and San Antonio Wings of the World Football League (WFL). Jerick Deshun McKinnon (born May 3, 1992) is an American football running back for the Minnesota Vikings of the National Football League (NFL).  He was drafted by the Vikings in the third round of the 2014 NFL Draft.  He played college football at Georgia Southern. Matt Asiata (born July 24, 1987) is an American football running back who is currently a free agent.  He attended Hunter High School and played college football at Utah.  Asiata was signed by the Minnesota Vikings as an undrafted free agent.  Asiata is tied with a number of other Vikings players for the franchise record of most rushing touchdowns in a single game at three.  He achieved this feat three times; once in 2013 and twice during the 2014 season when he started nine games after Adrian Peterson was suspended. Dalvin Cook (born August 10, 1995) is an American football running back for the Minnesota Vikings of the National Football League (NFL).  He played college football at Florida State, where he finished his career as the school's all-time leading rusher.  Cook was drafted by the Vikings in the second round of the 2017 NFL Draft. Caleb King (born January 10, 1988) is a former American football running back who was a member of the Minnesota Vikings of the National Football League.  He was signed by the Vikings as a rookie free agent in 2011.  He played college football at Georgia, redshirting in 2007 and playing from 2008–2010.
Answer: March 21, 1985