That's a good question. I follow Mark on Twitter @MarkGroteSports, and he hasn't updated his Twitter feed since the end of September.
I've also noticed Josh Liss, morning sports anchor on 780 AM/105.9 FM WBBM Newsradio, now doing the Xfinity reads on sister station 670 The SCORE instead of Grote.
While I'm asking, where has longtime SCORE Production/Imaging Director Russ Mitera been lately? I haven't heard his golden pipes in at least 2 weeks. I know Mitera's been one of the signature voices of WSCR since 2001 and the man behind quite a few promos for the CBS Sports Radio-owned station.