10:44am: Money appears to be the only holdup in a trade that would send Jackson to the Cardinals and Rasmus to the Blue Jays, tweets Rosenthal. An exchange of more than $1MM awaits approval, and of course the Cards will get more than just Jackson for Rasmus.

Jackson and Teahen are going to Toronto, tweets MLB.com's Scott Merkin. Heyman tweets that the two-team deal is done.

10:37am: Jackson is now being told a trade is official, tweets Bob Nightengale of USA Today. He's shaking hands with staffers, tweets Mark Gonzales of the Chicago Tribune from the White Sox clubhouse.

10:30am: The Cardinals continue to talk about Rasmus deals with the Blue Jays and other teams, tweets ESPN's Buster Olney, and the outfielder appears to be "very much available."

10:09am: Joel Sherman of the New York Post tweets that this deal is close but not complete, because the money exchange requires approval and the Jays are trying to spin Jackson to another team. That team may be the Cardinals, based on tweets from Joe Strauss, Jon Heyman, and Sherman. Sherman believes the Cardinals could also get a reliever and Colby Rasmus may be involved, but nothing is official. The Blue Jays have interest in Rasmus, tweets Morosi.

Meanwhile Alejandro De Aza is starting in center field for the White Sox this afternoon, necessitating a 25-man roster move.

9:21am: The White Sox are in serious talks for a deal that would send starter Edwin Jackson and third baseman Mark Teahen to the Blue Jays for reliever Jason Frasor and a prospect, tweets Ken Rosenthal of FOX Sports. Rosenthal's colleague Jon Paul Morosi says this deal is close and money could be involved. The rumor was first reported ten hours ago on Twitter by a fellow named Doug Seyller.

The Jays' motivation for renting Jackson for two months and taking on a bad contract in Teahen is unclear. There doesn't appear to be a draft pick angle, as both Jackson and Frasor project as Type Bs. Perhaps Blue Jays GM Alex Anthopoulos is considering flipping Jackson to a contender.

The White Sox were known to be seeking bullpen help, and Frasor has a club option for next year. The Sox could also subtract a reliever, as Joel Sherman of the New York Post reports that they're talking to the Cardinals about Matt Thornton. Maybe Kenny Williams' goal in the Jackson trade is to shed the $9.7MM left on the contracts of the two veterans, though we need to see the quality of the prospect involved. Sox pitchers John Danks and Gavin Floyd are also on the market, according to Rosenthal. The White Sox are currently 4.5 games out in the AL Central with another game against the Tigers tonight.