Mets lose Narváez to calf strain, call up top prospect Álvarez.

The New York Mets will place catcher Omar Narváez on the injured list due to a left calf strain, with a typical return to play of eight to nine weeks. The team plans to call up prospect Francisco Álvarez to take Narváez's place, who has shown promise with his bat and has made strides in his defensive abilities. The loss of Narváez could be significant for the Mets, who have struggled offensively in the early part of the season.