2:28pm: The Orioles are in on Iwakuma, MLBTR has learned. New GM Dan Duquette has been active internationally, signing Tsuyoshi Wada and showing interest in Wei-Yin Chen, Yoenis Cespedes, and Chong Tae-Hyon.
The Mariners rumor has been kicking around in Japanese reports since Friday. A week ago, Susan Slusser of the San Francisco Chronicle wrote that four teams inquired on Iwakuma, with the Athletics in that mix but with "lukewarm" interest. Iwakuma may have been on the Twins' radar, though they added Jason Marquis in late December. Both teams bid on him in 2010 via the posting process. The A's won with a $19.1MM bid, but could not work out a contract with Iwakuma.
Iwakuma, a member of the Rakuten Golden Eagles in 2011, posted a 2.42 ERA, 6.8 K/9, 1.4 BB/9, and 0.45 HR/9 in 119 innings, battling a shoulder injury.