[1] He inherited his number 17 from Ivan Klasnić who left St. Pauli for Werder Bremen.

[citation needed] In the summer 2018, Boll was hired as an assistant manager for SC Condor Hamburg.

[4] On 4 January 2019, Boll was appointed as the new manager of SC Victoria Hamburg with his former teammate from FC St. Pauli, Marius Ebbers, as his assistant.

[5] For the start of the 2019–20 season Boll was appointed assistant manager of Holstein Kiel.

This biographical article related to association football in Germany, about a midfielder born in the 1970s, is a stub.