AOS based on a sibling petition (or any other family-based petition that isn't Immediate Relative of USC) requires legal status in the US at the time of filing the AOS.
So regardless of the 10-year bar, he is not eligible to stay in the US for AOS, unless he qualifies for 245(i) protection.
EB3 ROW I-485 Approved: July 2007
USC: July 2013
I am a layman, not a lawyer. What I write here is not official or professional legal advice. In addition, my answers on this forum are specific to the scenarios discussed in each thread and should not be generalized to other situations.