 Clementi faced Marcin Held in the Semifinals on November 16, 2012 at and lost via toe hold submission in the second round.On November 19, 2012 Clementi announced his retirement after competing in MMA for 13 years.On July 24, 2013, Clementi announced he has come out of retirement and returned to Bellator to complete in the promotions Lightweight Tournament, He was set to face UK Fighter Rob Sinclair on September 27, 2013 at in the Quarterfinals.