In January 2017, through Aser, Radrizzani made an investment for 50% of the share capital of
Leeds United, making him co-owner of the club. On 23 May 2017, Radrizzani announced the 100% buyout of Leeds United, buying the remaining 50% shares from previous co-owner
Massimo Cellino, with Radrizzani taking full ownership of the club. Radrizzani's ownership of the club got off to a dramatic start; on 25 May, only two days after the takeover, and the day before Leeds were set to activate the option to extend head coach
Garry Monk's contract, Monk resigned as Leeds United head coach, with new owner Radrizzani saying that Monk's decision to quit the club had been a 'shock'. After taking over the club he made changes to Leeds' backroom staff, including appointing Victor Orta as director of football, Ivan Bravo as director of strategy and Angus Kinnear as chief executive. On 15 June 2017, Radrizzani appointed his first head coach when
APOEL manager
Thomas Christiansen was announced as the new head coach of Leeds United to replace Monk, with the club announcing that they "wanted to appoint someone who can help us create a winning culture at the club and unite everyone connected with Leeds United, from the players to the supporters". On 26 June, Radrizzani brought back
Leeds Ladies to Leeds United ownership to become Leeds United Ladies again after the club had previously become its own entity after previous owner
Massimo Cellino decided to stop Leeds United funding in 2014. On 28 June 2017, Radrizzani completed the purchase of
Elland Road, making the stadium the property of Leeds United for the first time since 2004. On 3 January 2018, Radrizzani announced an official partnership for Leeds with
Aspire Academy in Qatar. Aspire own Spanish team
Cultural Leonesa who have seen Leeds players
Yosuke Ideguchi and
Ouasim Bouy both join them on loan as part of the unique partnership. On 24 January 2018, Radrizzani introduced a new Leeds United badge which would be worn for the 2018/19 season onwards depicting the "Leeds Salute". However, the design of the new badge attracted criticism from huge numbers of fans, resulting in an
online petition over 77,000 signatures strong against the design's introduction. On 4 February 2018, head coach Thomas Christiansen was dismissed by Radrizzani, despite a promising start to his reign, after a poor run of results and with the team
tenth in the table. On 6 February 2018, Radrizzani appointed Barnsley manager
Paul Heckingbottom as the new head coach of Leeds United on an 18-month contract to replace Christiansen. On 7 March, towards the end of Leeds' 0–3 defeat against
Wolverhampton Wanderers, just before the final whistle, Radrizzani in a series of Twitter posts, questioned the legality and fairness of the competition. On 12 March, Radrizzani made public his decision to seek clarity from the Football League regarding league leaders Wolverhampton Wanderers, to seek clarification of the link with Wolves and 'super agent'
Jorge Mendes. In March 2018, Radrizzani announced that Leeds United would be going on a post-season tour of
Myanmar in May 2018 to play two friendlies. However, the tour announcement drew criticism nationally and from MP's and
Amnesty International due to the political situation in the country. Radrizzani defended the choice of location, declaring that 'This is about people not governments'. In Radrizzani’s first season as sole owner (2017–18), having been top of the League for the first quarter of the season, and dropping to fifth at the halfway point, Leeds missed out on playoffs completely after a disappointing run of form in the second half of the season, finishing
thirteenth in the table. On 24 May 2018, Radrizzani and
Leeds United announced that
49ers Enterprises had bought shares in the club to become a minority investor (49ers Enterprises is the business arm of the
NFL side
San Francisco 49ers owned by
Denise DeBartolo York,
Jed York and
John York). Head coach Heckingbottom was sacked by Radrizzani on 1 June 2018, having been at the club for just four months. Argentine manager
Marcelo Bielsa was named by Radrizzani as the club's new head coach on 15 June, signing a two-year contract with option of a third year, after two weeks of negotiations with the club. In doing so he became the highest-paid manager in Leeds United history. Radrizzani entered late talks to buy Italian
Serie B side
F.C. Bari 1908 in July 2018, to become a co-owner/investor, but pulled out of the deal, because of a financial deadline due to Bari's financial situation. On 16 July 2018 Radrizzani revealed that “Unfortunately, the short time available to perform detailed and thorough
due diligence checks, force us reluctantly to abandon this idea and challenge.” On 31 July, Radrizzani signed striker
Patrick Bamford to Leeds for £7 million (rising up to £10 million), the move representing the highest fee Leeds had spent on a player since
Robbie Fowler's move to the club in 2001. After the sale of promising young player
Ronaldo Vieira to Italian side
Sampdoria on 1 August, Radrizzani defended the sale to supporters by saying “We cannot buy players and never sell players.” During the
2018–19 season, Leeds finished the regular season in third place after dropping out of the automatic promotion places with three games left after a defeat to ten-man
Wigan Athletic on 19 April, Leeds qualified for the playoffs versus sixth-placed
Derby County, winning the first leg of the playoffs 1–0 win at Pride Park, but lost the home leg 2–4 with Leeds also down to ten men after the dismissal of
Gaetano Berardi. The loss saw Derby progress 4–3 on aggregate to the final against
Aston Villa and Radrizzani's club narrowly miss out on promotion. On 23 September 2019, Radrizzani was present at
The Best FIFA Football Awards 2019 as Leeds head coach Bielsa and the entire Leeds United squad won the
FIFA Fair Play Award:
2019 for Bielsa's sportsmanship in May 2019 to allow Aston Villa to score a goal unopposed in a game in which the ultimate result ended Leeds' 'mathematical' chances of automatic promotion the prior season. In January 2021, 49ers Enterprises increased its minority stake in Leeds United to 37%, and in November that year, increased its stake to 44%. The 2021/22 campaign concluded as Leeds survived relegation on the last day of the season with a win over Brentford. Had Burnley beaten Newcastle, Leeds would have been relegated irrespective of Leeds' result vs. Brentford. Radrizzani elected to keep Marsch for the next campaign and directed the fan base to support Marsch: “As a board, we will work hard with Jesse Marsch this summer to improve the squad and find a way to deliver the kind of performances you all deserve. “We believe that with time and a full pre-season, Jesse will be the man to take this club forward.” In August 2022, in an interview with the Athletic, Radrizzani had claimed that relegation would be "impossible" for Leeds United at the end of the then upcoming 2022/23 season: "I don’t have any doubt that we’ll avoid a situation similar to last season. “It’s [relegation] impossible.” At the end of the 2022/23 Premier League season, Leeds United was relegated. Despite survival on the last day of the 2021/22 season Leeds United's recruitment in summer 2022 was funded entirely key player sales - with Radrizzani overseeing the sale of Leeds' two best players in the same transfer window. Radrizzani placed significant trust in the club's recruitment strategy to try and ensure premier league survival. Unfortunately, Victor Orta, the then Director of Football, recruitment could be best characterised as 'hit and miss'. In May 2023, Leeds United was relegated from the Premier League. Radrizzani was, at time, still the majority owner, leaving the club in the second tier of English football, the division the club was in when Radrizzani first purchased a stake in the club from Massimo Cellino. Radrizzani took over Italian club
Sampdoria and saved it from bankruptcy in May 2023. The deal helped clear the way towards Radrizzani's sale of his interest in Leeds United, following the club's relegation from the Premier League. In June 2023, Radrizzani agreed a £170m deal to sell his majority shareholding in Leeds United to co-owners 49ers Enterprises. The EFL approved the deal on 17 July 2023. == Sampdoria ==