 Complete the following phrase:  After a spell in Serie B at Reggiana 199899, helping the club to Serie A promotion, Protti returned to Livorno in Serie C1 in 1999, where he rapidly became one of the most popular players in that clubs history, scoring 11 goals during his first season with the club. He later captained Livorno, leading the club to Serie B promotion during the 200102 Serie C1 season, winning the title, and finishing the campaign as the top-scorer, and the following season he was the top-scorer in Serie B. He subsequently led Livorno to Serie A promotion during the 200304 season, before retiring in 