MINNEAPOLIS -- Twins closer Glen Perkins threw off flat ground for a fourth time on Wednesday as part of the rehab process for his strained left shoulder, and he is scheduled to throw his first bullpen session on May 23.
Perkins, on the 15-day disabled list retroactive to April 11, made 25 throws from 90 feet before Wednesday's game against the Orioles. He said he'll continue to throw off flat ground, including a few rounds of long toss, before he gets to his first bullpen session, which he said will be the first real test.
"That will be the big day," Perkins said.