The striker, who scored just one goal in 12 months at Stadio Olimpico, will turn out for the Blucerchiati in the upcoming campaign
Gregoire Defrel has joined Sampdoria from Roma on a season-long loan deal, with the option of a permanent move.
The forward made 15 Serie A appearances for Roma after signing from Sassuolo in July 2017, scoring one goal in the 5-2 victory over Benevento in February.
The 27-year-old began his career at Parma and played for Foggia and Cesena before arriving at Sassuolo in 2015.
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His most prolific season came in 2016-17, when he scored 12 goals in 23 league starts for the Neroverdi, attracting the attention of Roma boss Eusebio Di Francesco.
However, his chances were limited in a Roma side spearheaded by Edin Dzeko and Diego Perotti, and he joins Samp in the hope of more regular first-team football.