Rainer Widmayer was appointed caretaker of the Berlin club after this  German football player was fired and became manager of what?
FC Luzern
Rainer Widmayer
Rainer Widmayer is a former German footballer and manager.
 During his active career, he played mostly in the lower divisions, except his final season, during which he played in the 2.
 Bundesliga for SSV Ulm.
 As manager, he has been assistant manager of Swiss clubs FC St. Gallen and Grasshopper Club Zürich.
 In Germany, he assistant managed Hertha BSC and the reserves and professional squad of VfB Stuttgart.
 After Markus Babbel was sacked as manager of Hertha BSC, Widmayer was appointed caretaker of the Berlin club.
 Several days later, having completed his duties of caretaker, Widmayer left Hertha altogether.
Markus Babbel
Markus Babbel (] ; born 8 September 1972) is a former international German football player and coach who is the manager of FC Luzern.
 He played as a defender for clubs in Germany and England.
Darren Crocker
Darren Crocker (born 26 March 1967) is a former Australian rules footballer and former player of the North Melbourne Football Club in the Australian Football League (AFL).
 On 16 June 2009, he was appointed caretaker coach of the North Melbourne Football Club after the resignation of Dean Laidley.
 On 17 August 2009 the North Melbourne Football Club appointed Brad Scott as their senior coach, thus Crocker was not retained as North Melbourne coach for the 2010 season.
 However, he remained as assistant coach at North Melbourne Football Club.
 In 2015, Crocker again served as acting coach when Scott underwent back surgery, and again for one match in 2016 when Scott was ill. West Ham United F.C. managers
London football team, West Ham United have had only fifteen permanent managers in their history and an additional three caretaker managers.
 Up until 1989 the club had only had five different managers.
 Before the appointment of Gianfranco Zola in 2008 the club never had an overseas manager, with the only non-Englishman being the Scot, Lou Macari.
 The current manager is Slaven Bilić who was appointed in June 2015.
 The most recent manager before that was Sam Allardyce who was appointed in May 2011 and left the club in May 2015.
 Numerous former West Ham players have taken on temporary managerial roles at the club, between permanent managers.
 Ronnie Boyce briefly took the reins, in February 1990, between Macari's resignation and the appointment of Billy Bonds.
 Former Hammer's player and board member Trevor Brooking was briefly in charge during two separate spells as caretaker manager in 2003, first during the illness of Glenn Roeder and again between Roeder's sacking and the appointment of Alan Pardew.
 Former player Kevin Keen has been caretaker manager twice; immediately prior to Gianfranco Zola's appointment in 2008 and after the sacking of Avram Grant in 2011. Wayne Powell
Wayne Powell is a former professional football player born in Caerphilly, Wales.
 He joined Bristol Rovers in 1975 and after 32 league appearances and 10 goals (plus a brief loan spell at Halifax Town) he joined Hereford United in 1978.
 Here, he made 6 league appearances and scored 2 goals before moving to Non-League football with Bath City.
 In April 2008 he was appointed manager of Clevedon Town.
 In October 2009 Wayne was appointed Caretaker manager of Leamington F.C. to help them out for a short period. Mick Galloway
Michael Anthony Galloway (born 13 October 1974) is an English former footballer who played as a midfielder.
 He was appointed caretaker manager for Hucknall Town's final game of the 2007-08 season, before being appointed as the club's permanent manager along with Andy Miller.
 In October 2008, they were dismissed.
 He then quickly joined Worksop Town as a player, he scored an excellent free kick on his debut away at Witton Albion which delighted the travelling support. Herbert Widmayer
Herbert Widmayer (17 November 1913 – 31 July 1998) was a German football player and manager.
 He is the first ever coach to be prematurely terminated in Bundesliga history.
 He was the younger brother of Werner Widmayer 2002–03 Fulham F.C. season
The 2002–03 season was Fulham F.C.'s 105th season in professional football and second consecutive season in the FA Premier League.
 It was also the first season in over 115 years where Fulham did not play at Craven Cottage.
 Due to pending decisions on re-vamping the cottage, all home games (apart from two early-season fixtures) were played at Loftus Road, the home of Queens Park Rangers.
 Jean Tigana remained as Fulham manager up until his sacking in April 2003.
 Former Fulham player Chris Coleman had not long been retired from the game since suffering a career-ending injury in a car crash when he was appointed caretaker manager for the rest of the season. Johnny Halligan
Johnny Donegan Halligan (c. 1899-?)
 was a Scottish football player and manager.
 Halligan played as an inside left for Shawfield, Hibernian and Montrose.
 He also worked for Hibernian as a coach, scout and caretaker manager.
 Halligan was appointed caretaker manager of Hibernian after the resignation of Bobby Templeton in February 1936 and held the position for over two months until Willie McCartney became manager. Caretaker manager
In association footballing terms, a caretaker manager is somebody who takes temporary charge of the management of a football club, usually when the regular manager is dismissed, or leaves for a different club.
 However, a caretaker may also be appointed if the regular manager is suspended, ill or unable to attend to their usual duties.
 Caretaker managers are normally appointed at short notice from within the club, usually the assistant manager, a senior coach, or an experienced player.
 In other sports, the term "interim manager" is more commonly used.