Edgin, who had a bout of tendinitis in his left elbow, played catch before Friday's game and said his elbow felt good.
Another reliever, right-hander Vic Black, has been on the 15-day disabled list with bone spurs in his neck. Black threw a bullpen session on Thursday in Florida.
"Right now he is [on track to be activated off the DL when eligible on Monday]," Collins said. "His side went great, he feels great."
Second baseman Daniel Murphy, who has been on the DL with a strained right calf, returned to baseball activities.
"Murph did some running today, did some lateral movement stuff, took some batting practice," Collins said. "We'll just press forward with the whole process."
Manny Randhawa is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.