Moore, who experienced dehydration and fatigue Sunday, is back for Monday's game against the Royals and said he feels good.
"It's hard to keep a good man down," Moore said. "Any time you get a little woozy and a little nauseous, it's a little scary. But I'm ready to go."
Moore went through a series of tests and was held overnight at the hospital before being released early Monday afternoon. Manager Ron Washington was glad to have Moore, who has been the Rangers' bench coach since 2008, back in the dugout with him.
"Jackie's not a spring chicken," Washington said. "He wasn't taking in enough fluids. He's got a box of them in his locker with a big sign on it: If you're dehydrated, it's too late."