The A's announced on Tuesday that they traded Kouzmanoff and cash to the Rockies for a player to be named later or cash considerations. Kouzmanoff will report to Triple-A Colorado Springs.
"He's had his fair share of success at this level, there's no getting around that," manager Jim Tracy said. "He has a very business-like approach, which is something that you love. He's a professional. That's exactly what he is."
Seven players have manned third base for the Rockies this season, with Ty Wigginton leading the way with 67 games and 61 starts there. Ian Stewart and Jose Lopez also have made double-digit starts. Subsequently, there has been no offensive consistency at the position: Colorado third basemen are collectively hitting just .213 with a .275 on-base percentage.
The 30-year-old Kouzmanoff was hitting .302 with 24 doubles, one triple, 13 home runs and 58 RBIs in 61 games at Triple-A Sacramento. He struggled in the bigs, though, in a way he hadn't before, and on June 6 was sent to the Minors for the first time since 2006.
"Surprise, shock. I didn't see it coming," Kouzmanoff said at the time. "As everybody well knows, I started off slow on both sides of the ball. I was unsatisfied with my play so far this season. I got the news that I'm going down, and all I can do is just go down and get my reps in and keep working and try to work my way back."
Kouzmanoff hit .221 with four home runs and 17 RBIs in 46 games with the A's this season. He first came to the organization in a trade with the Padres in January 2010.
The infielder's best season came in 2008, when he hit .260 with 23 home runs and 84 RBIs.The move is a homecoming for Kouzmanoff, who played at Evergreen High School in nearby Evergreen, Colo.
Evan Drellich is a reporter for MLB.com. Follow him on Twitter @EvanDrellich. Nick Kosmider contributed to this report. This story was not subject to the approval of Major League Baseball or its clubs.