CLEARWATER, Fla. -- Ken Giles said Wednesday morning that a doctor examined his back and told him the tightness he experienced there Tuesday is not serious.
The Phillies are confident about the diagnosis.
"I think he's good right now," Phillies general manager Ruben Amaro Jr. said. "He's still kind of day to day, but I think he's going to be OK. I don't think he's going to necessitate a DL [stint]."
Amaro said the Phillies should know more about Giles -- they are calling it a mild back strain -- in the next 48 hours. The Phillies would like to see Giles pitch in one of the spring's remaining three exhibition games, but if he does not appear in one of those games, they at least want to see him throw off a mound.
Would it be a risk opening the season with him on the roster if he is not completely healthy?
"We wouldn't risk it if we think it's a risk," Amaro said.
Amaro said Giles' back strain is milder than the one third baseman Cody Ache experienced last week. Asche missed three days before playing in a Minor League game Sunday. He returned to Grapefruit League action Monday.
Giles left Tuesday's Grapefruit League game against the Blue Jays after he felt a muscle grab him during an appearance at Florida Auto Exchange Stadium in Dunedin. Giles said he has been feeling some tightness there for a few days.
Todd Zolecki is a reporter for MLB.com. Read his Phillies blog The Zo Zone. Follow him on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.