1:10pm: There's no current discussion involving Crawford, Ramirez and Bell, ESPN.com's Buster Olney reports (on Twitter). The idea surfaced briefly as a concept and immediately died.

12:57pm: The Red Sox and Marlins are discussing a trade that would send Carl Crawford to Miami for Hanley Ramirez and Heath Bell, Bob Nightengale of USA Today reports. The Marlins approached the Red Sox about the possible blockbuster, Nightengale reports.

The biggest impediment to the deal is the Marlins' indecision about their course for the rest of the 2012 season. Miami VP Dan Jennings is in Boston scouting Crawford, according to Nightengale. The potential trade would be the second-biggest contract swap in history, trailing only the 2004 trade involving Alex Rodriguez and Alfonso Soriano, Nightengale writes.

The Marlins are also discussing trades involving Josh Johnson and Anibal Sanchez, plus a deal that would send Omar Infante back to Detroit, Nightengale reports.

Ken Rosenthal reported earlier today that the Red Sox are determining trade interest in Crawford. However, GM Ben Cherington says there's "nothing going on" with the left fielder, who is in the second year of a seven-year, $142MM contract he signed following the 2010 season.