August trades this year are a bit confusing. Teams can still make them — but only involving players not on 40-man rosters. The Cubs could trade Tony Cingrani, who hasn't been in MLB or on the 40-man yet this season. As long as it's for a similar minor league player or cash. However, waiver-wire moves are less crystal clear. Kevin Padlo has been designated for assignment by the Tampa Bay Rays, and the Cubs should be all over trying to acquire Padlo.
First off, he hasn't hit at all at the MLB level this year (in a very small sample size), his first MLB campaign.