 Giacomazzi stayed with Lecce in 2012 despite their relegation from Serie A in 2011-12 and subsequent expulsion from the Serie B for their part in the Calcio Scommesse scandal.Giacomazzi, the club's captain, rejected offers from Serie A sides Parma and Torino and Serie B team Cesena to remain at the club.In 2013, he joined Siena, a team that at the end of the season was excluded from the Serie B due to financial problems.