His career for Meidericher SV (in 1967 renamed as MSV Duisburg) ended due to injury.
At the beginning of the following season 1965-66 he missed the first matches under the direction of the new coach Hermann Eppenhoff and then made only occasionally part of the team.
[4] Along with an eighth rank in Bundesliga Meidericher SV achieved the qualification for the 1966 cup final.
[6] He suffered a serious knee injury in the summer of 1966, had to stop playing for several months and was not able to reintegrate the team of Meidericher SV/MSV Duisburg during the rest of the season 1966-67.
Mielke became part of the team of Verbandsliga Westfalen 2 (third division) club SG Wattenscheid 09 for some time[7] and then focused on his non-sport professional career.