The 5-11, 185-pound McCann joins Miami after spending the previous two seasons with the Baltimore Ravens, Dallas Cowboys and Oakland Raiders. McCann joined the Dallas Cowboys as an undrafted college free agent following the 2010 NFL Draft.
McCann has appeared in 21 career games and recorded 19 tackles, two passes defensed and one interception. He was named NFC Defensive Player of the Week after recording his first career touchdown on November 14, 2010 against the New York Giants, as he intercepted an Eli Manning pass and returned it for a 101-yard touchdown which set a record for the longest interception return in Cowboys team history. The following week McCann was named the NFC Special Teams Player of the Week as he found the endzone again when he returned a punt 97-yards for a score on November 21, 2010 against the Detroit Lions. McCann became the first rookie in NFL history to score on plays of 97 yards or more in consecutive weeks.
He played collegiately at Southern Methodist University where he was a four-year letter winner and three-year starter. He finished his career with the Mustangs with 54 tackles, three interceptions and 34 kickoff returns for 824 yards. Born September 29, 1987 in Oklahoma City, Oklahoma, McCann attended Putnam City High School in Oklahoma City, Oklahoma.