Ryan, who missed the final 11 games last season with a herniated disc, originally thought he'd be allowed to begin throwing on Tuesday. Instead, trainers held him back another day.
Ryan, 29, said he hopes to at least start playing catch on Wednesday.
"I don't think it'll be much," Ryan said. "No sliders, no curveballs, maybe a couple cutters. Mostly four-seamers."
Though Ryan tries to joke about the situation, it's not easy watching teammates warming up their arms and doing full work. He's still able to field ground balls, but isn't allowed to throw across the infield.
"It's more annoying than anything," Ryan said. "It's more like an unwanted attention type of thing. You don't want to come in with any setbacks or anything, but it's been an ongoing thing all offseason to get to this point. This is actually probably a good thing, being at this point.
"I didn't have any idea it would take as long as it did, and there would be as much affected by the herniated-disc thing. But it's something you battle forever, I guess, now, making sure my posture is good and things like that."