Gordon tore his ulnar collateral ligament in the thumb on a headfirst slide while stealing third base, his Major League-leading 30th steal of the year, in the eighth inning against the Reds on Wednesday night in Los Angeles. He is expected to miss at least six weeks of action.
"He's doing well, it sounds OK," Mattingly said. "It went pretty much as expected, still same time frame. We definitely needed to do it."
In the early stages of Gordon's rehab, the Dodgers will limit what the shortstop can do, but they plan on keeping him active.
"We'll find some stuff for him to do," Mattingly said. "Once he gets past getting stitches out, he'll take ground balls. He won't be able to throw or hit, but he'll be able to do some stuff that'll keep him strong and make sure things don't go away."
Gordon was hitting .229 with a .280 on-base percentage in 301 at-bats in 78 games.