The Pirates acquired righty Cesar Valdez from the Diamondbacks to complete the Zach Duke trade, the team announced on Twitter.
Valdez, 26 in March, tossed 20 innings for Arizona this year as a rookie. He also did his second Triple-A stint, posting a 5.90 ERA, 8.5 K/9, 4.5 BB/9, and 1.1 HR/9 in 97 2/3 innings. Heading into the '09 season, Baseball America ranked Valdez seventh among Diamondbacks prospects. They called his changeup "a legitimate plus pitch" and labeled him a potential back-rotation starter.
The Diamondbacks acquired Duke from the Pirates in November after he'd been designated for assignment. I'm guessing the Pirates' return was contingent on the D'Backs hammering out a deal with the arbitration eligible lefty, which they did for a $4.25MM guarantee.