None of them will take a discount, Mac didn't take a discount, but you can often lock those players down at potential savings by giving them the financial security of a guaranteed contract. Sometimes it works (Longoria, Wright, Mac, Reyes) sometimes it may not (imagine if Francoeur signed?)
This is the year we have to go for Heyward though, if we sign him to an arb2 deal our potential savings almost goes away with any certainty as our risk on our end is then 0.