Wigan Athletic to lose highly-rated coach to Chelsea
The 34-year-old has carved out a huge reputation for himself during his three years with Latics, having joined the club in 2017 when Paul Cook took over.
He was narrowly pipped to the Tranmere managerial vacancy earlier this summer, after signalling his intention to make the step up.
Barry, of course, will be well known to Blues star Reece James, who spent the 2018/19 season on loan with Latics.
His departure would further deplete the coaching ranks at Wigan, with Cook and Under-23 chief Nick Chadwick having moved on in recent weeks.
Cook's long-time No.2 Leam Richardson remains in charge of Latics - at least until a new buyer is found - and has been putting the squad through their paces at Euxton ahead of the new campaign.