Celtic youngster Calvin Miller has announced on Twitter that he is leaving the club. Miller, who can operate as a full-back or as a winger, has made the announcement on the social networking site in an emotional tweet this evening. The 22-year-old is over the moon to have lived his dream of playing for Celtic and is pleased to have enjoyed the success that he had with the Hoops. The Scottish youngster has added that he is looking forward to the next step in his career. Football Insider reported last week that Celtic did not plan on offering Miller a new contract, and that the youngster would leave the Glasgow giants when his current deal expires this summer. Miller, who has not played any competitive football since September after undergoing surgery, is available on a free transfer this su...