Name: Warning explicit: 'McGregor needs to defend or vacate'
Uploaded: 2017-08-02T15:46:26.008Z
Duration: 2 min 25 s
Description: Top lightweight Tony Ferguson says 155 lbs champion Conor McGregor is holding up the division, with the Irishman diverting away from UFC for a boxing showdown with Floyd "Money" Mayweather.