The Arizona Diamondbacks announced they have traded Stephen Drew to the Oakland Athletics for shortstop Sean Jamieson.

"These moves are always tough," D-backs' General Manager Kevin Towers told reporters after the trade was announced. "We thanked [Drew] for everything he's done for this organization."

Drew batted .193 with two home runs and 12 RBI in 40 games with the D-backs this season. He missed 137 games over the last two seasons after suffering a horrific ankle injury in July of 2011.

The 29-year-old said he was surprised to hear he was traded after the team's loss to Miami Monday.

"I was a little shocked," Drew said. "But, first and foremost, I want to say thanks to the fans who have supported me and also to the organization.

It's part of the business and I guess it's going to be good on both sides."

Drew is expected to report to Oakland tomorrow and will be reunited with his former manager Bob Melvin.

The 23-year-old Jamieson hit .234 with 10 home runs and 49 RBI in 118 games with Single-A Burlington this season. He was selected in the 17th round of the 2011 First-Year Player Draft.

Towers believes the young shortstop has a bright future, even if he is a few years away from the big leagues.

"We acquired a young shortstop, a Canadian kid who has speed and power for the position," Towers said. "He's probably a ways away, but he's somebody we think is a legitimate middle-infield prospect, which is something we've lacked in our system."

The 6-foot-0, 193-pound right-handed hitter is a career .234 hitter with 13 home runs and 70 RBI over two minor league seasons in the Athletics organization.