Thursday marks the deadline for MLB clubs like the St. Louis Cardinals to agree on a deal with players who are arbitration-eligible before either the player or team file for arbitration.

Six Cardinals players, including their record-setting closer and Gold Glove-winning fielder, are negotiating deals with team ahead of Thursday's deadline to swap salaries.

The St. Louis Cardinals have been open about their desire to trade third baseman Nolan Arenado this offseason, but no progress has been made into January. That may be changing, though Arenado will have to take the initiative to make it happen.

St. Louis Cardinals third baseman Nolan Arenado could still be traded after he blocked a potential trade to the Houston Astros in December. However, his options have seemed to dwindle and there's really only one team out there who could possibly make a deal for Arenado: the Boston Red Sox,