There has already been plenty said about the St. Louis Cardinals about who could be on the move this season if the club opts to trade away pieces. We did a deep dive on six players who could be gone by the trade deadline, either by way of a trade or by simply being sent down to the minors. We've also done a breakdown of four players who shouldn't go anywhere this season as well. But with the Cardinals playing as well as they have, what about guys who they could target and try to bring to town? The Cardinals aren't going to go out and make some massive splash. That wouldn't align with the strategy of the season. St. Louis has been clear that the team's view of the season hasn't shifted. So, if the Cardinals are going to add any pieces this season, expect veteran castoffs that the club could add for cheap. With that being said, here are three guys to watch if the Cardinals want to add more pieces.…