Teams have done it in the past. For example, in the 2013 draft, the Blue Jays gave Rowdy Tellez $850k in Round 30, and Jake Brentz $700k in Round 11. That same year the Cardinals gave Steven Farinaro $750k in Round 11. Can't find if anybody bested the Tellez bonus for the 2014 draft. The rumor (not sure of the ultimate source) is that Rodon wanted a deal in that range, $700k, back in 2011. I feel like the Brewers will be saving a lot of money in Round 5 and can probably squeeze some extra money out of most of the college players they picked after Round 6, $700k-$800k doesn't seem that far-fetched but maybe I'm wrong. By no means is it unheard of, but it takes a bunch of different events to make possible. The Tellez scenario was very unique...I don't think the Blue Jays thought they could sign him when they drafted him. While they will save some money it will mostly be handed out to some of their top picks. Clark will get a slight chunk and the Canadian they took will get a hearty chunk himself if he will sign. 700k is realistic before some of their top picks gets over slot bonuses. A lot lower afterwards.