Question: What person was manager for Bayer Leverkusen immediately before the man who is the third-highest goalscorer in the history of Bundesliga?

Context articles: Joel Pohjanpalo
Bayer 04 Leverkusen
Bayer 04 Leverkusen (women)
Bayer Giants Leverkusen
Kai Havertz
Robin Dutt
RTHC Bayer Leverkusen
Stefan Kießling
2017–18 Bayer 04 Leverkusen season
Jupp Heynckes

Joel Pohjanpalo (born 13 September 1994), is a Finnish professional football striker who plays for German Bundesliga side Bayer Leverkusen and represents the Finland national team.
 Pohjanpalo was born in Helsinki, Finland where he played for HJK before he was loaned to Bayer 04 Leverkusen at age 19 in 2013.
Bayer 04 Leverkusen Fußball GmbH, also known as Bayer 04 Leverkusen ] , Bayer Leverkusen, Leverkusen or simply Bayer, is a German football club based in Leverkusen, North Rhine-Westphalia.
 The club plays in the Bundesliga, the top tier of the German football league system, and hosts matches at the BayArena.
Bayer 04 Leverkusen, also known as Bayer Leverkusen, Leverkusen, or simply known as Bayer, is a German women's football club based in Leverkusen, North Rhine-Westphalia.
 The club plays in the 2.
 Bundesliga, the second tier of German women's football.
Bayer Giants Leverkusen is a professional basketball club, part of the Bayer Leverkusen sports club based in Leverkusen, Germany.
 It currently plays in ProA, German second league.
Kai Havertz (born 11 June 1999) is a German professional footballer who plays as a midfielder for Bundesliga side Bayer Leverkusen.
 Upon making his debut for Leverkusen in 2016, Havertz became the club's youngest ever debutante in the Bundesliga and became their youngest ever goalscorer when he scored his first goal the following year.
Robin Dutt (] ; born 24 January 1965) is a retired German football player, manager and currently board representative for sport of VfB Stuttgart.
 He was also the manager of Bundesliga side Werder Bremen and Bayer Leverkusen.
 Previously he coached SC Freiburg after taking over from the long-serving Volker Finke in July 2007.
 He had previously been manager of Stuttgarter Kickers for four years.
 Starting from the 2011–12 season, he signed a two-year managerial contract with Bayer Leverkusen after the previous manager Jupp Heynckes confirmed on 21 March 2011 that he would not be extending his stay at the BayArena.
Ruder Tennis Hockey Club Bayer Leverkusen (RTHC Bayer Leverkusen e.V.) is a German rowing, field hockey and tennis club, one of the projects supported by Bayer 04 Leverkusen and Bayer AG and with 2500 members, it is additionally one of the largest sports clubs in Leverkusen.
Stefan Kießling (] ) (born 25 January 1984) is a German footballer who plays as a striker for Bayer Leverkusen.
 Born in Lichtenfels, West Germany, Kießling began playing football at a young age in the youth setup at 1.
 FC Eintracht Bamberg before moving to the 1.
 FC Nürnberg academy in 2001.
 He made his professional debut for Nürnberg as a 19-year-old in 2003 before being sold to Bayer Leverkusen in the summer of 2006.
The 2017–18 Bayer 04 Leverkusen season is the 114th season in the football club's history and 39th consecutive and overall season in the top flight of German football, the Bundesliga, having been promoted from the 2.
 Bundesliga Nord in 1979.
 In addition to the domestic league, Bayer Leverkusen also are participating in this season's edition of the domestic cup, the DFB-Pokal.
 This is the 60th season for Leverkusen in the BayArena, located in Leverkusen, North Rhine-Westphalia, Germany.
 The season covers a period from 1 July 2017 to 30 June 2018.
Josef "Jupp" Heynckes (] ; born 9 May 1945) is a German retired professional footballer and manager.
 As a player, he spent the majority of his career as a striker for Borussia Mönchengladbach in its golden era of the 1960s and '70s, where he won many national championships and the DFB-Pokal, as well as the UEFA Cup.
 During this period, the team also played in its only European Cup final in 1977, losing to Liverpool.
 He is the third-highest goalscorer in the history of the Bundesliga, with 220 goals.
 He was a member of the West Germany national team that won the UEFA European Championship and the FIFA World Cup in the first half of the 1970s.