From Melissa Dudek, Assistant Media Relations Director:
The press conference is not open to the public. We will be streaming it
online on CalBears.com.
http://www.calbears.com/allaccess/
We also will have an event in the near future that will be open to the
public, but I do not have a date or details for that one yet.
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I just re-checked the website and the link to the press conference has just appeared (though it likely won't be activated until shortly before 3 pm).