Holland said the center could miss the season opener Oct. 2 against the Vancouver Canucks. He said if McDavid were healthy, he would likely play two or three of Edmonton's seven preseason games.
"But obviously it's a unique situation," Holland said. "Now one at most, but it's very likely zero. We've got three weeks to go and we're going to be conservative. I'd rather be safe than sorry. If he's not ready for opening night, then he's not ready for opening night."
McDavid, who tore the PCL in his left knee in the season finale against the Calgary Flames on April 6, was on the ice with some Oilers teammates Saturday for the first time since sustaining the injury, which did not require surgery.
"He was obviously in Toronto all summer. He's got a group of people there that were working with him on his rehab," Holland said. "I got constant videos, one or two videos a week, of him skating and training, and our training staff and our doctors were in communication. We had some conference calls in May and June and then they communicated, our staff with their staff, and I think everything we've heard all along has been positive."