2:08pm: MLB.com's Noah Coslov says the White Sox received Mark Kotsay and cash from the Red Sox for Anderson. A Red Sox press release says Anderson will be assigned to Triple A Pawtucket. The 27 year-old voiced his desire for a trade last Thursday to MLB.com's Scott Merkin. He has a .225/.288/.364 line in 862 career plate appearances (and here's a look at his glovework; the biggest sample is 966 innings in '06).
Kotsay was designated for assignment by Boston on Friday. The 33 year-old hit .257/.291/.324 in 79 plate appearances for the Red Sox; he'd re-signed in January for $1.5MM plus incentives. He was hobbled by calf and back injuries.
1:59pm: The Red Sox acquired Brian Anderson from the White Sox, according to David Lefort of the Boston Globe. It's unclear what the Red Sox gave up or where they'll assign Anderson, who had been playing in the minors for the White Sox.
Tim Dierkes contributed to this post.