The Liverpool manager was hitting back at quotes from ex-Old Trafford boss Sir Alex Ferguson after the legendary United boss suggested Liverpool were eight players short of mounting a title challenge.
Rodgers responded: "That's probably two short of what they need. We need eight, they need 10."
Ferguson wasn't shy to give his opinion on a number of topics related to Liverpool in his new autobiography, from Steven Gerrard to Jordan Henderson.
He described Gerrard as not a 'top, top player' and compared him unfavourably to Roy Keane and Paul Scholes, while he expressed his surprise at Rodgers' appointment as he was 'only' 39-years-old.
Rodgers didn't take too kindly to the remarks, and hit back in a press conference prior to Liverpool's weekend fixture against West Brom at Anfield.
The '10 players' remark may be excessive, but United have clearly struggled this season under new boss David Moyes.
Despite inheriting a title-winning squad from Ferguson, Moyes has suffered disappointing home results to West Brom and Southampton and United currently sit eight points off the pace set by Arsenal at the top of the Premier League table.
United only signed one first-team player over the summer - the £27.5m acquisition of Marouane Fellaini.
Liverpool were much busier, brining in Iago Aspas, Luis Alberto, Mamadou Sakho, Victor Moses and Aly Cissokho.