"I understand it," Overbay said. "They want to go young. It's part of the deal. Hopefully I've done everything that they've asked of me."
The 35-year-old Overbay was in his second stint with the D-backs. Originally drafted by the organization in the 18th round in 1999, he was traded away in 2004 before being brought back last August after being released by the Pirates. He served as a mentor for young first baseman Paul Goldschmidt.
"Great teammate," D-backs manager Kirk Gibson said of Overbay. "He's helped Goldy out tremendously. These things are never easy, but it was an organizational decision."
After a hot start to the season, Overbay had just two hits in his last 25 at-bats. With Sunday's acquisition of third baseman Chris Johnson, the D-backs had to essentially choose between Overbay and rookie Ryan Wheeler.
Wheeler's versatility -- he can play third and first, as well as the outfield -- worked in his favor.
"I was very lucky to have the opportunity to work with him," Goldschmidt said.