Michael USA banned by Phelps Swimming for second drink-driving offence . USA was excluded from Phelps 's World Championship squad . But Phelps executive director Chuck Wielgus may allow USA to compete .
Michael Phelps banned by USA Swimming for second drink-driving offence . Phelps was excluded from USA 's World Championship squad . But USA executive director Chuck Wielgus may allow Phelps to compete .