One of the big things David worked on with Viloria was improving the position of his back elbow .
David , the Chukars ' hitting coach , said Viloria is mechanically sound as a hitter .
One of the big things David worked on with Viloria was improving the position of Viloria 's back elbow .
David , the Chukars ' hitting coach , said Viloria is mechanically sound as a hitter .