Kouzmanoff was traded by the A's along with cash on Tuesday to the Rockies in exchange for future considerations and is expected to report to Triple-A Colorado Springs, which just so happens to be near his offseason home in Evergreen, Colo.
The 30-year-old infielder, initially acquired by the A's in a January 2010 trade with the Padres, was expected to be Oakland's long-term answer at third base. He hit .247 last season with a team-leading 16 home runs and 71 RBIs, committing 12 errors, but was unable to produce on either side of the field this year, batting just .221 with four homers and 17 RBIs while committing nine errors in just 46 games.
Those numbers led to Kouzmanoff's demotion on June 26, marking his first stint in the Minors in five years.
"As everybody well knows, I started off slow on both sides of the ball," Kouzmanoff said at the time. "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."
Scott Sizemore has since been handling everyday third-base duties, and he entered Tuesday's contest against the Yankees batting .235 with five homers and 32 RBIs in 59 games with the A's. A natural second baseman, Sizemore has displayed tremendous improvement at the hot corner and has made seven errors since his arrival in Oakland.
It's not yet clear, though, whether Sizemore is viewed as a permanent everyday player at the position. The A's may indeed add a third baseman to their winter shopping list, as the organizational depth there remains limited.
On Tuesday, backup infielder Eric Sogard got the start at third, a decision influenced by his 1-for-2 performance against Yankees starter Bartolo Colon in the two clubs' last meeting. Sogard responded by hitting his first career home run in the top of the third inning.