Jason Day's agent later said in a statement that she was suffering from concussion symptoms and resting comfortably. Bud Martin added that Ellie Day had no hard feelings toward James, quoting her as saying, "He was just doing his job. Go Cavs."
James was unable to slow himself in time from plowing into Ellie Day, who was sitting next to her husband enjoying the Cavs' 104-100 win over the Oklahoma City Thunder.
James spoke briefly to Ellie Day as she was being immobilized and strapped to a backboard before being carried out of Quicken Loans Arena.
"She squeezed my hand and said she was fine. I think she was just a little weary," said James, who was noticeably shaken by the incident.
It's not uncommon for players to dive into the stands in NBA games. On a few occasions there have been minor injuries, but to this point nothing serious.
But fans are paying big money for premium seats that are closer than ever, creating the potential for problems.
Cavs coach David Blatt, who spent years coaching in Europe, has long been worried about courtside fan safety.
"It's always concerned me, the sideline seats," he said. "Always concerned me, because things like that, when you're talking about players of this speed and physicality and effort level, it's not a simple thing. The powers that be are the ones that really need to decide how to deal with that. He (James) made an honest attempt at the basketball, that's all, obviously. We all hope she's OK."
The league has recently taken steps to improve safety, including cutting the number of photographers allowed to sit along the baselines to reduce the risk of contact with players.
With a full slate of Christmas Day games just a week away, it may be time for the NBA to consider implementing changes to make the game experience safe for fans so close to the floor.
Other leagues have had to address fan safety following incidents. Major League Baseball this month recommended extra protective netting for seats near the field after a summer of fans being hurt by foul balls and flying bats.
In 2002, a young fan died two days after being hit by a deflected puck at a Columbus Blue Jackets game. Brittanie Cecil was killed two days before her 14th birthday, a tragedy that led to the installation of more protective netting at NHL arenas.
There may be no way to avoid what happened between James and Ellie Day, who has attended many Cleveland games with her Australian husband in the past.James said the incident hasn't changed how he feels about fans being near the floor.
"It's a great experience for our fans," James said. "I mean, that doesn't happen much. It's unfortunate it happened tonight, but that doesn't happen much. Our fans are why our game is so great.
Sitting courtside, it's all part of the game. It's pretty cool. If I was a fan, which I am a fan of the game, but, I would love to sit courtside and watch games."
