On 26 November, Somma joined Chesterfield on loan until January 2010. Somma was given squad number 32, and made his Football League debut for the team on 2 December, starting a game against Crewe Alexandra. Somma had a penalty saved by Crewe goalkeeper Steve Phillips on his debut. Somma missed a number of Chesterfield's games through injury. After Somma's one-month loan spell expired on 5 January 2010, he returned to Leeds. He immediately returned to a Leeds first team squad when he was named on the bench in the FA Cup replay against Tottenham Hotspur.