He announced his retirement after the 2013 Paris–Roubaix, citing a lack of motivation to continue as a lead sprinter. However he subsequently expressed a desire to take up an offer from the Omega Pharma-Quick Step team to ride as a lead-out man for Mark Cavendish, which he said was made to him days after his retirement. The contract offer was blocked by the UCI as it forbids riders from transferring from one team to another mid-season. In July 2013 Patrick Lefevere announced that Petacchi would be joining Omega Pharma-Quick Step from the start of August on a 14-month contract. On 12 April 2014 he got his first victory for his new team at Grand Prix Pino Cerami and also his first victory since 2012. In January 2015 it emerged that Petacchi would ride for in 2015. However, after racing in that year's Giro at the age of 41 and being forced to withdraw from the race one day before its conclusion due to a virus, Petacchi announced his second retirement from the sport in June 2015.