Its gotta be something serious. Back in November he did an interview that said he was rejuvenated and ready to play this season. But then stayed on LTIR and now his retirement. Hopefully its just the Blackhawks saying we dont have a roster spot for you anymore with our youth movement, just stay on LTIR and enjoy the free paycheck.
You're mixing up Toews and Seabrook. Seabrook 'ended his hockey career' today. He's technically not retired though as that would fuck the Hawks with the cap. He's just forever on LTIR like Hossa and Chris Pronger.
As for Toews, this reminds me alot of Bryan Bickell. It's too bad he wasn't diagnosed sooner as he was in and out of the lineup for a bit. It also cost the Hawks Teuvo Teravainen.
If Toews does end up being out forever, that's a huge chunk of cap space that opens up between him and Seabrook.