The former German youth international is looking for a new club.
West Ham's current record holder for most expensive player is Andy Carroll after they spent £15 million to bring him in from Liverpool.
But the player who held the record before that is perhaps one most West Ham fans would like to remember.
His time in Florence was also poor. In that time he was consistently AWOL, out on loan and generally misbehaving at La Viola.
He spent time on loan with Bologna, Juve Stabia and 1860 Munich whilst also sampling football in Bulgaria and Romania with Chernomerets Burgas and FC Vaslui respectively.
He then moved back to Germany with SpVgg Unterhaching and eventually found himself playing for Viktoria Koln in German football’s fourth tier. He then went on to fail in a trial at Hapoel Ironi Akko.
It is not only on the pitch where he has struggled - In 2012 he spent three weeks in a Thai jail after faking a kidnapping to extort money from a family member.
At the end of last year however he was dealt a lifeline from an unlikely location - Kazakhstan.
Nsereko signed for Kazakh Premier League side FC Atyrau in December 2013 and it is proved to be a moderate hit.
He got a full pre-season under his belt and announced himself onto the Kazakh scene in some style. He scored a sensational goal on his debut. It was his first goal in professional football since he netted as a teenager for Brescia, against Pisa, in January 2009!
He was player of the month in the Kazakh Premier League back in March but at the end of the season he did not renew his deal with the club and went to undergo a trial period at Russian side Anzhi Makhachkala back in July.
However he did not do enough to convince Anzhi to take him on board for the new season and he has been without a club since.
But he is now on trial with yet another Kazakh team, looking set to continue plying his trade in the rather odd location.
He is training with Irtysh Pavlodar, arriving with the club yesterday ahead of an indefinite spell with the club.
Irtysh finished fourth in the Kazakh Premier League last season but are the most successful team in post-Soviet era Kazakhstan so consider them the 'Manchester United' of Kazakhstan.
It may not be the heavy heights once hoped for him, and once paid for him by West Ham, but if he is now finally enjoying his football not many would begrudge him his Kazakhstan adventure.