Conceivable that Cubs eventually could end up eating Descalso’s contract ($3.5 including 2021 buyout), but seems unlikely during offseason.
Sure, the off-season roster spot has some value, but probably makes more sense to see how he looks in the spring and if there’s a spot for him after whatever off-season Cubs moves. If not a spot then, that’s the time to make a move. But, keep in mind that rosters expand to 26 in 2020, so will have an extra bench guy.
Also possible he could be included in a trade to offset some other payroll guy coming back in a multi-player deal. He had an uncharacteristically good season in 2018—not that long ago. So, somebody might like him in that kind of deal.