Just on value alone, its pretty awful...
Roberts is about a top 50 player, Jones isn't even a top 200.
Roberts is a top 3 2nd base, todd jones is the low-end of low for relief pitchers.
Jones is in an obvious decline(39), Roberts is still close to his prime(30)
I am not 100% sure if I would veto(although probably), but its a REALLY bad trade considering you would have to use a 4-5th round pick for roberts, and you could get Jones 15+. Jones is literally the worst or tied for worst "ownable" relief pitcher in a standard fantasy league.
I would say at least a middle tier closer would be a bit more appropriate for what many believe to be a top 3 second basemen.
While Need is a concern, you don't address need by dumping a 4-5th round player for a 15th round player. All your doing there is hurting yourself at 2 positions instead of just 1.
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