The Cardinals should add a starter, a good one, because entering Monday night's game in Pittsburgh their rotation ranked sixth in the National League in quality starts (44), seventh in ERA (4.21) and 11th in innings pitched.
The Cardinals should add a top-shelf starter because they have asked their excellent bullpen to handle more than 330 innings. Three of top 25 most-used relievers in the NL (Andrew Miller, John Gant and John Brebbia) wear the birds on the bat.
Most importantly, the Cardinals should add a special starter because the area where "impactful" and "attainable" overlap in their trade-deadline Venn diagram includes strong starter, and not much else.