"Initially, he passed all of the tests that are required by the protocol," Holmgren said. "Initially, I'd say we didn't think that. Now, I would say it's safe to say he has symptoms of a concussion. So, that's the way we're treating it now. He's still not doing too good, so we'll continue to monitor him."
Holmgren said Read will be sidelined at least through Sunday's game at Madison Square Garden, pushing his total games missed to at least six. Read has experienced headaches and other eye-related issues, which should raise a few eyebrows about the severity.
Read left last Tuesday's game in Calgary in the first period after receiving an elbow to the head from Brian McGrattan.
"Rapid eye movement, stuff like that," Holmgren said when asked about Read's difficulties. "When he turns his head to look for a pass, stuff like that. It's probably, in all likelihood, concussion-related."
Clearly, no two concussions are the same. Michael Raffl suffered a diagnosed concussion in Colorado a week ago today, one game after Read, and Raffl felt well enough to play in New Jersey on Tuesday night.
Holmgren also revealed for the first time that Read suffered from "one other [concussion] since he's been here." In 2011, during Read's rookie season, the Flyers covered up Read's concussion and labeled it an "upper-body" injury. Read missed three games from Nov. 2-5, 2011.
"You know, when you get hit hard even in the upper body, your brain is bound to rattle around inside your head a little bit," Holmgren said. "I can't explain it. As far as we've come in diagnosing those type of injuries and as far as we've come in treating them, we've still got a ways to go, I guess."