Randall Liu, the NFL's director of NFC football communications, tweeted that 26 draft prospects have confirmed that they will travel to Chicago to attend the NFL draft coming up on April 30:
The consensus top two quarterback prospects, Marcus Mariota and Jameis Winston, are not on the list.
Also, as noted, Missouri defensive end Shane Ray is the only local prospect that has confirmed his attendance so far.
Update: 11:25 a.m.
Two more prospects have been added to the list, per Gil Brandt: