UPDATE: The trade has been confirmed by both SI's Jon Heyman and the Globe's Nick Cafardo.

A Kansas City radio station (WHB 810) is reporting that the Red Sox dealt Coco Crisp to the Royals for 27 year-old relief pitcher Ramon Ramirez.

Neither the Red Sox nor the Royals have officially confirmed the trade yet, and (per MLBTR) Red Sox exec Ben Cherington was on XM's MLB Home Plate radio station saying "the report is premature." The Globe has more on the story from folks in KC:

[D]uring an on-air interview a few moments ago, Royals senior adviser Mike Arbuckle would not confirm that the deal was complete.

"I would say Coco is a good player and we're always interested in getting good players," said Arbuckle, who recently joined the Royals after working in the front office of the World Champion Philadelphia Phillies.

Arbuckle politely declined a request from the hosts to evaluate Crisp as a player, saying, "Well, at this point, he's still under control of another organization. I wouldn't want to get into a tampering charge."

The deal was first reported on the station by Brian McRae, a former Royals outfielder. When contacted via e-mail and asked if there was anything to this rumor, Kansas City Star columnist Joe Posnanski gave a one-word reply: "Yes."

Per MLB.com, Ramirez went 3-2 with a save and a 2.64 ERA in 71 games for Kansas City this year, including 3-1 with a 2.33 ERA after the All-Star break.