Conor McGregor certainly looks like a guy hellbent on resuming his fighting career ... 'cause he's already back in the gym, less than a month after gnarly leg surgery!!
The UFC superstar showed off some pics from his late-week workout on Friday ... and by the looks of the photos, it seems Conor ain't holdin' back much in the weight room.
The 31-year-old got in some quad work, some pull ups and some shoulder exercises ... a truly remarkable feat, given what he went through just days ago.