Question: John Parker is the younger brother of a professional boxer that was born what year?

Context articles: Anthony Dirrell
John Parker (boxer)
John Parker (Continental Congress)
Guido Mazzinghi
Juan Zegarra
Jermall Charlo
Joseph Parker (boxer)
Drian Francisco
Antrobus baronets
Boreel baronets

Anthony Dirrell (born October 14, 1984) is an American professional boxer who held the WBC super middleweight title from 2014 to 2015.
 He is the younger brother of 2004 Olympic bronze medalist Andre Dirrell, who is also a professional boxer.
John Parker ( ; born 8 April 1994) is a New Zealand professional boxer.
 He is the younger brother of Joseph Parker.
John Parker IV (June 24, 1759 – April 20, 1832) by birth inherited a spot in South Carolina's aristocracy.
 He was born to John Parker III and Mary Daniell, granddaughter of Governor Robert Daniell.
 He married Susannah Middleton, daughter of Henry Middleton and sister of Arthur Middleton.
 He was American planter of the Hayes Plantation and lawyer from Charleston, South Carolina.
 He also served as a delegate for South Carolina to the Congress of the Confederation from 1786 to 1788.
Guido Mazzinghi (14 May 1932 – 1996) was an Italian middleweight boxer.
 He competed in the 1952 Summer Olympics, but was eliminated in the third bout.
 In 1954 he turned professional and retired in 1957 as a reigning Italian champion with a record of 35 wins out of 36 bouts.
 His younger brother Alessandro was also a professional boxer.
Juan Zegarra (born February 8, 1986) also known as El Martillo, is a Peruvian Light Welterweight professional boxer who is currently undefeated.
 He is the younger brother of David Zegarra, who is also a Peruvian boxer.
 Juan's professional boxing record is 14-0-0(15).
Jermall Charlo (born May 19, 1990) is an American professional boxer who held the IBF light middleweight title from 2015 to 2017.
 His identical twin brother, Jermell Charlo, is also a professional boxer and is younger by one minute.
 Both brothers are graduates of Hastings High School.
 They began boxing when they started following their father, himself a former boxer, into the gym.
 In 2016, both brothers became world champions when Jermell won the WBC light middleweight title.
Joseph Dennis Parker, ( ; born 9 January 1992), also known by his honorary matai title Lupesoliai La'auli, is a New Zealand professional boxer.
 He is currently the WBO heavyweight champion, having held the title since 2016.
 Previously he held multiple regional heavyweight championships including the WBO Oriental, Africa, and Oceania titles; as well as the PABA, OPBF, and New Zealand titles.
 As an amateur he represented New Zealand at the 2010 Commonwealth Games in the super-heavyweight division, and narrowly missed qualification for the 2012 Olympics.
Drian Francisco (born November 10, 1982 in Sablayan, Occidental Mindoro, Philippines), nicknamed Gintong Kamao (Golden Fist), is a Filipino professional boxer.
 Born in the province of Mindoro, Francisco currently resides in Agoncillo, Batangas.
 His younger brother Lloyd Francisco, like him, is also a professional boxer.
The Antrobus Baronetcy, of Antrobus in the County Palatine of Chester, is a title in the Baronetage of the United Kingdom.
 It was created on 22 May 1815 for Edmund Antrobus, of Antrobus Hall, Antrobus, Cheshire, a Fellow of the Royal Society, with remainder to his nephews Edmund Antrobus and Gibbs Antrobus.
 He died unmarried in 1826 and was succeeded according to the special remainder by his nephew Edmund, the second Baronet.
 He and his brother Gibbs were the sons of John Antrobus, brother of the first Baronet.
 The second Baronet was succeeded by his eldest son, the third Baronet.
 He sat as Member of Parliament for Surrey East and Wilton.
 His eldest son, the fourth Baronet, was a Colonel in the Coldstream Guards.
 He died without surviving male issue and was succeeded by his younger brother, the fifth Baronet.
 Most of the Amesbury Abbey estate in Wiltshire was sold the same year.
 The fifth Baronet died unmarried and was succeeded by his first cousin, the sixth Baronet.
 He was the son of Robert Crawfurd Antrobus, younger son of the second Baronet.
 He was childless and on his death in 1968 the line of the second Baronet failed.
 He was succeeded by his second cousin once removed, the seventh Baronet.
 He was the eldest son of Edward Geoffrey Antrobus, second son of John Coutts Antrobus, son of the aforementioned Gibbs Antrobus, younger brother of the second Baronet.
 As of 2008 the title is held by the seventh Baronet's eldest son, the eighth Baronet, who succeeded in 1995.
 He lives in Johannesburg, South Africa.
The Boreel, later Boreel Baronetcy, of Amsterdam in the Netherlands, is a title in the Baronetage of England.
 It was created on 21 March 1645 for William Boreel.
 He was Dutch Ambassador to England, Sweden and Venice.
 The title descended in the direct line until the death of his grandson, the third Baronet, in 1710.
 The late Baronet died unmarried and was succeeded by his younger brother, the fourth Baronet.
 He died without male issue and was succeeded by his first cousin, the fifth Baronet.
 He was the son of James Boreel, younger son of the first Baronet.
 He died childless and was succeeded by his nephew, the sixth Baronet.
 He was the son of James Boreel, younger brother of the fifth Baronet.
 He never married and was succeeded by his first cousin once removed, the seventh Baronet.
 He was the grandson of John Hieronymous Boreel, younger brother of the fifth Baronet.
 His son, the eighth Baronet, was created a Jonkheer in the Dutch nobility.
 The title descended from father to son until the death of his grandson, the tenth Baronet, in 1937.