I remember mentioning on here after Urias was dealt that it wouldn't shock me if he had some good moments in Boston, but that it wouldn't necessarily mean he would've had those moments here, had he stayed. I think it was time.
Anderson is clearly the best defensive option at 3B, but the really ugly ABs he's turned in, followed by the IL stint, followed by a lot of inactivity doesn't bode well for him suddenly getting back to being the hitter he was in April & May. I'm guessing with Monasterio (probably) needing a little breather we'll see Anderson a time or two, and if the struggles continue then it becomes a tough call of do you want to jettison the best defender at the position, in favor of someone (Black) who puts up ABs well beyond his years but might be a coinflip with the glove? If it becomes an either/or between those two they may just wait until 9-1, add Black & keep 'em both.