What is Gregory Mertens?
{{Infobox football biography | image = | image_size = | caption = | name = Gregory Mertens | fullname = Gregory Mertens | birth_date = {{Birth date|1991|2|2|df=yes}} | birth_place = [[Anderlecht]], Belgium | death_date = {{death date and age|2015|4|30|1991|2|2|df=yes}} | death_place = [[Genk]], Belgium | height = | currentclub = | clubnumber = | position = [[Defender (association football)|Defender]] | youthyears1 = 2004–2005 | youthyears2 = 2005–2006 | youthyears3 = 2006–2010 | youthyears4 = 2010–2011 | youthclubs1 = [[R.S.C. Anderlecht|Anderlecht]] | youthclubs2 = Dilbeek Sport | youthclubs3 = [[K.A.A. Gent|Gent]] | youthclubs4 = [[Cercle Brugge]] | years1 = 2011–2014 | years2 = 2014–2015 | clubs1 = [[Cercle Brugge]] | clubs2 = [[K.S.C. Lokeren Oost-Vlaanderen|Lokeren]] | caps1 = 73 | goals1 = 5 | caps2 = 28 | goals2 = 0 | totalcaps = 101 | totalgoals = 5 | nationalyears1 = 2006 | nationalteam1 = Belgium U16 | nationalcaps1 = 1 | nationalgoals1 = 0 | nationalyears2 = 2009–2010 | nationalteam2 = [[Belgium national under-19 football team|Belgium U19]] | nationalcaps2 = 5 | nationalgoals2 = 1 | nationalyears3 = 2011 | nationalteam3 = [[Belgium national under-21 football team|Belgium U21]] | nationalcaps3 = 7 | nationalgoals3 = 1 }} '''Gregory Mertens''' (2 February 1991 &ndash; 30 April 2015) was a [[Belgians|Belgian]] professional [[footballer]]. His position was [[central defender]]. He played in the [[Belgian Pro League]], playing for [[Cercle Brugge K.S.V.|Cercle Brugge]] (2011&ndash;2014) and [[K.S.C. Lokeren Oost-Vlaanderen|Lokeren]] (2014&ndash;2015). He was born in [[Anderlecht]]. Mertens went into [[cardiac arrest]] and collapsed on 27 April 2015 while playing a game against [[K.R.C. Genk]]. He died from [[heart failure]]