Munoz is on the Cardinals' 40-man roster now, and the Cardinals see him as a capable backup shortstop who could fill the role that would have been held by Aledmys Diaz.

Schrock, 23, hit .321/.379/.422 with an .801 OPS while playing second base. He hit seven home runs with 19 doubles in 106 games. He's considered one of the top-10 prospects in the minors at second base. MiLB.com ranked him the 17th-best prospect in Oakland's farm system.

The Cardinals believe Schrock can play second, third, and first in the infield and that his bat will dictate how he advances. The versatility will allow taht to happen when an opportunity presents itself.

"Schrock is someone that has that very excellent offensive profile for us," Mozeliak said. "Everywhere he's been, he's hit. He too gives you a lot of defensive flexibility. You can move him around. When you are looking at all the different things we are trying to do, it's nice to be able to find a couple of players we can stick right into Class AA or Class AAA and know they are going to be productive."