Tann won his first eight bouts, including a bizarre disqualification win over journeyman
Clifford Couser (Couser was DQ'd for picking Tann up, slamming him to the mat, then trying to hit him while he was down) in 2003, but was dropped and decisioned by Willie Chapman that same year. In 2004 he beat Jason Gavern and in 2005 beat
Derek Bryant, but later in the year had another defeat, to Domonic Jenkins via decision. During two separate bouts in 2007 televised by
ShoBox, Tann was knocked out by heavyweights
Chris Arreola and
Alexander Dimitrenko. After the loss to Dimitrenko, Tann retired from boxing. ==Professional boxing record==