CLEARWATER, Fla. --- The sensation in Ken Giles' back was described to Ruben Amaro Jr. as milder than what recently slowed third baseman Cody Asche for four days. The Phillies general manager does not anticipate a stint on the disabled list for the team's promising young set-up man.

"We wouldn't risk it if we think it's a risk," Amaro said.

Giles, 24, exited his outing Tuesday after facing only two batters. The 24-year-old afterward downplayed the injury, calling it "just tightness." Amaro on Wednesday labeled it a "mild mid-back strain." The pitcher's status is day-to-day, according to Amaro, who added "we'll probably know more in the next 48 hours."

The Phillies will need to see Giles pitch off a mound before Monday's season opener if he is to pitch in the series against the Red Sox. That could come in one of this weekend's exhibition games against the Pirates but could also happen in a side session in the bullpen.

Giles, who emerged last summer the team's closer of the future, allowed six runs over 8 2/3 Grapefruit League innings. He struck out 10 but also issued eight walks.