Martinelli returned to Sampdoria in June 2013; he signed a new 5-year contract with the Genoese club.[11]
On 2 September 2013, he was signed by Venezia.[12][13] On 7 July 2014, he was signed by Modena in a temporary deal, with an option to purchase.[14]
Brescia
He left for Brescia in the same formula on 9 July 2015.[15][16]
On 25 July 2016, the loan was renewed,[17][18] and in August 2017 Martinelli signed for Brescia on a permanent basis.[19]
Palermo
In August 2019 he was signed by Serie D club Palermo. As a regular, and also captaining the team in Mario Santana's absence, he won promotion to Serie C on his debut season with the Rosanero.
On 7 September 2020, Palermo announced Martinelli was forced to retire from active football due to cardiac issues.[20]