5:57pm: Renck reports the Harden-A's agreement is unconfirmed (Twitter link). The Rockies are out on Harden. Susan Slusser of the San Francisco Chronicle reports that the A's have talked to Harden, who appears to have better offers elsewhere (Twitter links). Slusser notes that the A's are still talking to Justin Duchscherer.
5:09pm: The A's will sign Rich Harden, Troy Renck of the Denver Post reports (Twitter link). Harden spent the first five and a half seasons of his career in Oakland, where he posted lofty strikeout numbers and a 3.42 ERA between trips to the DL.
The 29-year-old continued to encounter health issues in 2010, but the low ERA and remarkable strikeout numbers were nowhere to be found. Harden battled glute and shoulder injuries this year and posted a 5.58 ERA with 7.3 K/9 and 6.1 BB/9 in 92 innings for the Rangers.
Seven teams other than Oakland reportedly had some interest in Harden: the Yankees, Twins, Rays, Diamondbacks, Brewers, Mariners, and Rockies.