I seem to remember there being some clause that the Jays would be responsible for anything above what another team pays him. But the other team will pay him league minimum and bonuses to get around that, so the Jays will almost certainly have to pay his full salary minus the pro rata league minimum
Story is Frank was due 10 million for next season if he hit 370 something AB's. Frank starts in mini slump and they realize he's slowing down and they try to demote him to a part time player to save 10 million and at least get some production. Frank has none of it and now the Jays are forced to throw away 9 million without a lick of production.