Glenn Sherlock moved from Mets bench coach to full-time catching instructor this winter, extending a partnership with Buck Showalter that began in the Yankees organization in the 1990s.

If there is a primary mission for Sherlock, it’s preparing 21-year-old rookie Francisco Alvarez for major league catching duties. Alvarez has begun spring training behind Omar Narvaez and Tomas Nido on the depth chart, and will have to show he’s ready as a receiver and defender before he can be considered for the starting job, bringing a potentially potent bat to the lineup.

Sherlock spoke this week with Post Sports+ about Alvarez’s baseball education and his own experience last season as Showalter’s top lieutenant.

At what point did you really begin focusing on Alvarez, and what it will take to prepare him for the major leagues?