Question: When was the 15th pick of the 2011 NFL born ?

Context paragraphs:
2011 San Diego Chargers season: The San Diego Chargers season was the franchise's 42nd season in the National Football League and the 52nd overall.  The team failed to improve on its 9–7 record from 2010, and finished in a three-way tie with the Denver Broncos and Oakland Raiders for the AFC West division title, with an 8–8 record, but lost the tiebreaker to the Broncos and missed the playoffs for a second consecutive season.  For Norv Turner, this was his fifth season as the head coach of the Chargers.  The Chargers had the 18th pick in the 2011 NFL Draft.

2011 Miami Dolphins season: The Miami Dolphins season was the team's 42nd season in the National Football League, the 46th overall and the fourth under head coach Tony Sparano.  The Dolphins made their first round selection with the 15th pick of the 2011 NFL Draft on Florida offensive lineman Mike Pouncey.  The team got off to an 0–7 start and won six of their final nine games, but failed to improve on their record from 2010, resulting in Sparano being fired on December 12, 2011.

2011 Jacksonville Jaguars season: The Jacksonville Jaguars season was the franchise's 17th season in the National Football League and the 9th under head coach Jack Del Rio, who was fired on November 29 and replaced on an interim basis by defensive coordinator Mel Tucker.  The team had hoped to improve on their 8–8 record from 2010, but exceeded their loss total in Week 13, and were officially eliminated from postseason contention.  With the 10th pick in the 2011 NFL Draft, they selected quarterback Blaine Gabbert from the University of Missouri, and Gabbert would replace Luke McCown as the starting quarterback in Week 3.

Mike Pouncey: James Michael Pouncey (born July 24, 1989) is an American football center for the Miami Dolphins of the National Football League (NFL).  He played college football for the University of Florida, was a member of a BCS National Championship team, and earned All-American honors.  He was drafted by the Dolphins in the first round of the 2011 NFL Draft.

Jimmy Smith (cornerback): James Michael Smith (born July 26, 1988) is an American football cornerback for the Baltimore Ravens of the National Football League (NFL).  He was drafted by the Ravens with the 27th pick in the 2011 NFL Draft.  He played college football at University of Colorado.

Cam Newton: Cameron Jerrell Newton (born May 11, 1989) is an American football quarterback for the Carolina Panthers of the National Football League (NFL).  He played college football at Auburn and was drafted as the first overall pick by the Panthers in the 2011 NFL Draft.  Newton is the only player in the modern era to be awarded the Heisman Trophy, win a national championship, and become the first overall pick in an NFL draft within a one-year span.  He was the 2011 NFL Rookie of the Year, is a three-time Pro Bowler, and was named to the NFL All-Pro First Team in 2015.

D. J. Smith (American football): Darryl Devon Smith Jr. (born February 24, 1989), better known as D.J. Smith, is a former American football linebacker.  He was drafted by the Green Bay Packers out of Appalachian State University in the sixth round (186th pick overall) of the 2011 NFL Draft.

Robert Quinn (American football): Robert Quinn (born May 18, 1990) is an American football outside linebacker for the Los Angeles Rams of the National Football League (NFL).  He played college football at North Carolina, and was drafted by the Rams with the 14th pick in the first round of the 2011 NFL Draft.

J. J. Watt: Justin James "J. J." Watt (born March 22, 1989) is an American football defensive end for the Houston Texans of the National Football League (NFL).  He was drafted by the Texans with the 11th pick in the first round of the 2011 NFL Draft, and played college football at Wisconsin.

Marcus Cannon: Marcus Darell Cannon (born May 6, 1988) is an American football offensive tackle with the New England Patriots of the National Football League.  Prior to the 2011 NFL Draft, Cannon was considered one of the top offensive tackle prospects and was selected by the Patriots in the fifth round with the 138th pick of the draft.  He played college football at Texas Christian University.

Supporting paragraphs: 2011 Miami Dolphins season Mike Pouncey
Answer: July 24, 1989