Babel, Hamann and now Hyypia, albeit temporarily.
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Sami Hyypia has been placed in temporary charge of Bayer Leverkusen after Robin Dutt was sacked following a fifth consecutive loss.
The former Liverpool defender will work alongside Under 19 coach Sascha Lewandowski until the end of the season.
Leverkusen sporting director Rudi Voeller and managing director Wolfgang Holzhaeuser lost patience with the Dutt after Saturday's 2-0 loss at home to Freiburg.
Leverkusen lie sixth in the Bundesliga on goal difference and are fighting for a Europa League place.
"With Hyypia and Lewandowski in charge, we want to turn things around and resume right away," sporting director Rudi Voeller said. "The team now has to step up and show some responsibility.
"Bayer are better than this and we must aim higher."
Hyypia retired from playing last summer in order to study for his coaching badges at Bayer, who he joined from Liverpool in 2009.
He now has his UEFA A-license and feels he is ready to make the step into management.
"I know the team and firmly believe in it," he said. "We - Sascha Lewandowski and I - want to show Bayer Leverkusen how to get back on track.
"It is an unsettled team that has not taken its chances in recent weeks. But, having been at the club for the past three years, I have an advantage in that I know the players."