Cubs seem to have an endless supply of highly desirable prospects to use in trades. Each year a new wave of chips to go "all in" with.
The Cubs were really bad for a while. Theo was/is really smart at running a team and traded useful players and signed bounce back candidates that could be dealt at the deadline each year. It's not like they sneaked up on anyone. But to make a point...
They don't have any more in Baseball America's Top 100 after the Quintana trade.
Exactly this. This is there throw into the fire because they don't have reliable pitching at this point. Arrieta has lost a step and looks more like last year (slightly more refined than what he was on the Borioles) and is not going to be re-signed at season's end. Lackey is toast and will probably retire at season's end. Brett Anderson is awful and won't be retained. Hendricks isn't what he was last season, namely because everything but his changeup is iffy at best. Lester is still the ace of the staff, but is closer to what he was for the Sox then what he was last season. That leaves them with Montgomery and Butler. Not a duo that any MLB club is "afraid" of.
As to all who said they will make a move for Gray or any other "big name" starter, the Cubs basically just traded their last big chips even if they were to try and center an offer around Schwarber. The Cubs made their big move to try and right the ship for the remainder of the season, but also they are trying to re-stock the MLB team's pitching. Remember all those claims three seasons ago when the Cubs and the Mets were "legandary trade partners" because the Mets had arms but no bats, and the Cubs had bats but no arms? Well they both got to the last dance, the Mets lost and are stuggling to get back because they basically have run their arms into the ground. The Cubs won it all but realize that not having any arms really hurts when the offense falters.
I don't think that move is enough to get past the Brewers, as the bats need to bounce back. The Brew crew can slug with the best of them, and especially in the "juiced ball era", they can make mediocre pitching look even worse with one or two swings of the bat.