BOSTON — Defenseman Dennis Seidenberg, out since early April when he had his left wrist sliced by an opponents’ skate, has started doing some one-arm exercises and leg workouts, he revealed after one of his workouts today at TD Garden.

He recently had a waterproof cast put on so that he could begin some activity, and can move his wrist about 10 degrees. The original prognosis was an eight-week absence for Seidenberg.

“Right now, I don’t even think about coming back,” he said. “When I get a little further, it’s possible (to predict).”

Based on the original prognosis, Seidenberg’s return to action would mean the Bruins would be pretty deep in the Stanley Cup playoffs.

“Well, the Final, but when they get to the finals without me, I don’t think they’re going to play me,” he joked.