Indians, Cardinals believed to be working on significant trade

UPDATE (THURSDAY) -- The deal is done, and will be a one-for-one swap sending Moss to St. Louis for Kaminsky.

ORIGINAL -- On a crazy night in baseball in which Cole Hamels was dealt to the Rangers, a crazy three-team deal between the Marlins, Braves and Dodgers was swung and a deal sending Carlos Gomez to the Mets collapsed, we may have another significant deal.

According to sources, the Indians and Cardinals are believed to be making progress on a deal that appears to be significant, likely involving top Cardinals' prospect Rob Kaminsky. The sides have been discussing Brandon Moss in recent talks as well, according to a source. The possibility of a one-for-one-swap of Moss-for-Kaminsky appears to be in play.

Moss would fit for the Cardinals as an option in the outfield and at first base in the wake of injuries to Matt Holliday and Matt Adams. The 31-year old is under team control for the next two seasons.

Kaminsky, a 20-year old left-hander, is currently ranked as the third-best prospect in the Cardinals' system, meaning that a significant piece would be coming back to the Cardinals if he is indeed involved in the trade. Kaminsky was the Cardinals' first-round pick (28th overall) in the 2013 draft, and is currently pitching with High-A Palm Beach.

Indians who may be available at the trade deadline include Brandon Moss, Carlos Santana, Carlos Carrasco, and Danny Salazar, though it is unclear who the Cardinals may be targeting in talks.