He remained with Newell's Old Boys for four seasons, scoring twice in fifty-seven appearances in all competitions between 2015 and 2018.[1] On 30 January 2018, Paz joined Italian Serie A side Bologna.[7][8] On 4 February, Paz was loaned back to Argentina to play for Lanús.[9] His first appearance arrived in a 2–1 Copa Sudamericana defeat to Sporting Cristal on 7 March, which preceded a further three matches for them.[1] He returned to Bologna for the next season and a half, as he made his club debut during a two-goal loss away to Juventus on 26 September 2018.[1]
On 31 January 2020, after six appearances for his parent club, Paz joined fellow Serie A team Lecce on loan; purchase option included.[10] After debuting in 4–0 victory over Torino on 2 February, the defender appeared twelve further times as they suffered relegation to Serie B.[1] Paz then went back to Bologna, subsequently featuring for the club across the first half of 2020–21; notably scoring his first goal in the process, as he netted in a home draw with Atalanta on 23 December.[1] On 1 February 2021, Turkish Süper Lig side Kayserispor announced the loan acquisition of Paz; until the succeeding June.[11][12]
On 27 August 2021, Paz signed a two-year contract with Serie B club Crotone.[13] On 19 February 2022, the contract was terminated by mutual consent.[14]