 After the dismissal of Ballardini and the appointment of Edy Reja as new head coach, Baronio found again limited space in the first team and left Lazio on 30 June 2010 after his contract expired.In September 2010 Lega Pro Prima Divisione club Atletico Roma announced to have signed Baronio on a free transfer.At the end of the season, he became a free agent without a team, after his club went bankrupt, and he retired from football in 2011.