Answer
Riccardo Montolivo served as the captain of AC Milan for four years, from 2011 to 2015. He was a key player in the team during this time, helping them to win the Serie A title in 2011-12 and the Supercoppa Italiana in 2012. Montolivo was also named Serie A Player of the Year in 2011-12. He left AC Milan in 2015 to join Fiorentina, where he has played ever since.