Los Angeles closer Eric Gagne was placed on the 15-day disabled list on Tuesday because of stiffness in his surgically repaired pitching elbow and the Dodgers activated second baseman Jeff Kent, who had been out with a sprained left wrist. Gagne earned his first save in nearly a year on June 6 by striking out two in a perfect ninth inning in an 8-5 victory over the Mets, but said afterward he wasn't 100 percent. The right-hander went on the DL retroactive to June 7.