However, after the club appointed Siniša Mihajlović as head coach in November 2013, Berardi lost his place in the starting lineup and only made five Serie A appearances during the subsequent 2013–14 season.

[7] Berardi made his Leeds debut on 12 August 2014, starting the League Cup match against Accrington Stanley, but was sent off for a "mid-air sliding tackle" and received a three-match ban as a result.

[8][9] With regular right back Sam Byram suspended,[10] Berardi was set to start against Bradford City on 27 August, but was ruled out after picking up a concussion the day before the game.

[14] Berardi finished the season in strong form at left back, starting 10 of the last 11 games and becoming a fans' favourite for his performances.

[24][25] On 7 August, in the opening fixture of the season against Queens Park Rangers in a 3–0 defeat, Berardi was substituted early in the first half after picking up a hamstring injury.

On 26 October 2016, he made his return when he started in Leeds' penalty shootout victory against Norwich City in the League Cup, after a dramatic 2–2 draw in normal time.

[29] On 6 August 2017, Berardi suffered a dislocated shoulder in the 3–2 victory against Bolton Wanderers in the first game of the season, and had to be replaced by debutant Vurnon Anita in the first half.

[35] After missing 10 games combined through suspension for the 2017–18 season, Berardi apologised for his poor discipline in an interview with LUTV, stating that "it's not good enough for a senior professional player", adding that he will "stop making mistakes when I die".

[38] He started the season as first choice centre back alongside Liam Cooper, keeping Pontus Jansson on the bench, however Berardi was ruled out for a number of weeks[39] after picking up a knee injury against Middlesbrough on 31 August.

[46] The red card was the seventh of Berardi's Leeds career, equalling Alan Smith as the most red-carded player in the club's history.

[48] He received his eighth red card for the club against Millwall on 5 October, at the time making him the most red-carded player in Leeds United history.

[54] However, he was allowed to remain at the club's Thorp Arch training ground while completing his rehabilitation from the ACL injury, and on 16 October 2020 signed a new one-year contract for Leeds' first season back in the Premier League.

[56] On 23 May 2021, after a 3–1 home win against West Bromwich Albion, Berardi alongside teammate Pablo Hernandez officially departed Leeds United, bidding an emotional farewell to their fans after making their final appearances for the club.