I'll post a snippet below but it is from this article (paywall) from last Friday after Petro hit UFA:What did JR say?
"It’s believed there are takers for Blues center Tyler Bozak, and perhaps defenseman Justin Faulk, but it would require Armstrong giving up draft picks and retaining salary."
He goes on to say:
"Similarly with Faulk, Armstrong might be able to find a taker for his new seven-year extension (with a $6.5 million AAV), but is he willing to surrender, let’s say, a second-round pick and retain salary?
Thus far, a source said, Armstrong hasn’t wanted to commit to those types of moves in order to sign Pietrangelo, who will turn 31 in January, to a long-term extension."
I don't see much there, and I don't think DA is going to punt on Faulk until the expansion draft at the earliest.