Hamilton threw about 50 balls at 120 feet before the Rangers opened a two-game series against the Seattle Mariners. Hamilton said he didn't feel as bad as he thought he would and hopes to start swinging a bat on Wednesday.
"Everything in my body feels good except for my ribs," Hamilton said. "Day by day it's slowly getting better."
Hamilton was placed on the 15-day disabled list Friday. The move was retroactive to April 27. He was originally injured on April 21 in Toronto when he crashed into the outfield wall while chasing a flyball. He started a game in Baltimore on April 25, pinch hit the next day, but was unavailable for two games against Oakland last week.
"Some spots I still felt something," Hamilton said of his throwing session. "But like I said, pain is my guide. If it hurts I'm going to shut it down. If it doesn't I'm going to keep going."