He began his career in the Polish third division with hometown club Pogoń Siedlce. He joined Ekstraklasa team Legia Warsaw in 1999 and, whilst still a reserve, had a spell on loan at Dolcan Ząbki in 2000. Boruc broke through to the Legia first team in 2002 and by 2003 had become the club's first choice goalkeeper. In the summer of 2005, he joined Scottish Premier League side Celtic. In his five years in Glasgow, Boruc made 221 appearances for the club, winning the league three times, the Scottish Cup once and the Scottish League Cup twice. Celtic fans nicknamed Boruc 'The Holy Goalie' for his devout Catholicism. He moved to Italy in 2010 to join Fiorentina, spending two years at the Serie A club before returning to Britain in 2012 to sign for Premier League side Southampton, moving to Bournemouth in 2015 after a season on loan.