The Fukuoka Softbank Hawks recently released Okajima from his contract, allowing him to pursue opportunities at the MLB level. A few teams had interest in Okajima, who spent the 2012 season in Japan after pitching with the Red Sox from 2007-11.
Okajima posted a 0.94 ERA with 6.8 K/9 and 1.1 BB/9 over the course of 47 2/3 innings in Japan last year. The 37-year-old was a key contributor in Boston's bullpen from 2007-10, posting a 3.06 ERA with 7.9 K/9 and 3.1 BB/9 over the course of 254 appearances during that four-year period. If the A's complete a deal with Okajima, he'll join left-handed relievers Sean Doolittle, Jerry Blevins and Jordan Norberto in the Oakland bullpen.