Aldo throws shade at McGregor: 'Some of us can train while still promoting'

Jose Aldo took a very thinly veiled shot on Twitter at fellow featherweight Conor McGregor on Friday:

McGregor, of course, is embroiled in a battle with the UFC over whether he should have to do fight promotion. McGregor balked at it ahead of a scheduled rematch against Nate Diaz at UFC 200 in July, and was subsequently pulled from the card.

McGregor then issued an ultimatum of sorts to the UFC: either remove his promotional obligations and let him focus on training, or consider him retired.

Aldo's history with McGregor surely precipitated Friday's shade-throwing tweet. When the two fought at UFC 194, McGregor knocked out Aldo in 13 seconds.