TUCSON, Ariz. -- For Tom Gordon, the past few weeks have brought him something that he has not had in baseball for years now: freedom from pain.

The veteran reliever, who has dealt with arm issues for years, is attempting to work his way back from elbow surgery which cut short his 2008 season.

"I now have an idea what it's like to not have pain or soreness," Gordon said. "I think I just got immune to it there for a while. This feels so much better."

Gordon will hop on the mound for his first bullpen session on Monday. The 41-year-old has played catch on flat ground, throwing all of his pitches for eight of the past 10 days.

"The way things are going now, I feel really good about it," he said.

D-backs manager Bob Melvin said there is no timetable for when Gordon will be ready for regular-season action. The team has already said that he will begin the year on the disabled list.

"Outing to outing, we'll see how he feels," Melvin said.