Option 7. Accelerate Stephen Piscotty‘s development.
If Mozeliak struggles to find any options at the big league level, he may dip into the farm system. Stephen Piscotty, who was expected to battle Grichuk for the starting right field gig before the Jason Heyward trade, is still at Triple-A Memphis, and is capable of playing third base. Of course the only problem with that is Matt Carpenter is there. However, Carpenter surely would be willing to move across the diamond in order to help the team.
Piscotty himself could make the move to first of course, the minors are for developing players after all. This is an unlikely option, because Piscotty is currently struggling mightily with a new swing he’s adopted in hope of turning line drives into long fly balls, and is slashing .237/.333/.451 at Memphis. Piscotty is a career .285/.355/.437 hitter, so if this move is to be made, Mozeliak will surely wait until Piscotty hits his stride in Memphis before making the call.
If this is a legitimate option though, the Cardinals would be wise not to give up any assets for an aging first baseman when Piscotty would be waiting, training, in the wings. Even if the plan is for Piscotty to be the third baseman/outfielder of the future, players who offer versatility are valuable regardless.