By Jon Weisman
One month and four days since his last game for the Dodgers, Kiké Hernandez has been activated from the disabled list, where he has been recovering from left rib cage inflammation.
To make room on the 25-man roster, Austin Barnes has been optioned to Triple-A Oklahoma City. Barnes doubled in four at-bats during his most recent stint with the Dodgers.
Hernandez has a .280 on-base percentage while slugging .346 this season for Los Angeles.
In other recent news for the Dodgers, who scored runs in the seventh and ninth innings Saturday but fell to Arizona, 4-2 …