Francisco Alvarez, Omar Narvaez, Gary Sanchez, Tomas Nido — here’s how the Mets’ coming logjam could play out

The Mets have no fewer than four catchers in their organization who can make a case for a big league roster spot, and the team faces big upcoming decisions because of it.

The first move will come over the next few days, when Gary Sanchez can opt out of his minor league deal. The opt-out is Friday, but the deadline is actually a bit later.

Per sources, here’s how it works: If Sanchez is not on the Mets’ active roster by the beginning of the day Saturday (midnight, technically), he can inform the team that he is exercising his right to opt out. The Mets would then have 24 hours to add him. As a result, this could easily stretch into Sunday. The team has not inquired with Sanchez about extending the deadline.

Assuming for a moment that the Mets do add Sanchez and designate current backup Michael Perez for assignment, Sanchez and Francisco Alvarez would become the catching tandem.

That’s straightforward, but subsequent moves will be trickier. Tomas Nido is on the injured list after undergoing a procedure to correct dry eyes. He’s soon to start a rehab assignment, but the team does not know how long he will be out.

Omar Narvaez (calf injury) is expected back in about three weeks, which could be ahead of Nido. The way the Mets think of it, Narvaez’s roster spot is secure, and the front office and manager Buck Showalter would decide in the short term between Sanchez and Alvarez.

Alvarez is batting just .218 with a .274 on-base percentage, including .167 in his past seven games, but has impressed veterans and coaches with his energy, work ethic and pitch-framing.

But he does have options, meaning that he can be sent to the minor leagues without losing him — and the same can’t be said for Sanchez or Nido. Perhaps Alvarez will build on his dramatic home run Wednesday and hit enough to force his continued presence on the roster.

The situation could become particularly complicated when Nido returns. The team continues to value his defense highly, and believes that he is a better hitter than he showed this year while dealing with the vision issue. The choice between Nido and Sanchez, if it comes to that, would have to come down to health and performance when the time comes.

Over the next few days, the Mets will continue to look at scouting and data on Sanchez’s defense in Triple-A before making a final decision about adding him.