After three and a half years in Kent Sidibé rejected an offer of a new contract and joined Stoke City in July 2005 on a free transfer.

His career at Stoke was disrupted from 2010 by a serious Achilles tendon injury, which recurred after his return and was then compounded by a knee dislocation, in total keeping him out of first-team football for more than two years.

After his return, Sidibé spent time out on loan at Sheffield Wednesday and Tranmere Rovers before his contract at Stoke ended in May 2013.

The following season, he joined CA Paris-Charenton as a result of Red Star's financial demise which led to the club almost filing for bankruptcy.

[5] He continued his impressive form and produced a man of the match display against Queens Park Rangers in the FA Cup.

Eventually, new Stoke manager Johan Boskamp signed Sambégou Bangoura to play alongside him in attack.

Sidibé has since gone on to score his second Premier League goal of his career and season against West Bromwich Albion in a 1–0 win against their fellow newly promoted rivals.

On 6 December, Sidibé netted his third goal at Newcastle United, to start the fightback from Stoke losing 2–0 to eventually draw 2–2, putting them 13th place in the league.

On 12 December, Sidibé suffered a knee injury whilst playing for Stoke City against Fulham at the Britannia Stadium.

Sidibé thought he scored in a 1–0 defeat at Aston Villa however referee Lee Probert deemed it to be a foul on Stephen Warnock.

[32][33] However, in his next reserve match against Port Vale Sidibé suffered more injury woe as he was carried off in the second half with a dislocated knee.

[45] He made his league debut on 13 September, in a 1–0 away win against Pirin Gotse Delchev, playing the full 90 minutes.

Four days later, Sidibé scored his first goal in Bulgaria, netting fifth in a 6–2 home win over Haskovo in the Bulgarian Cup.

He was first called up to the national team shortly after his debut for Gillingham, featuring in two unofficial friendlies in the south of France against Istres and Monaco, scoring against the latter.

In July 2009, Lassana played a pre-season friendly for Stoke's rivals Port Vale, in an attempt to follow Mamady into the Football League.

[59] On 12 July 2014, Sidibe and his wife, Bineta, opened a pâtisserie in the Potteries Shopping Centre called Melice.