Through this, the depth of quiet at Citi Field was difficult to overstate. The monotone of the public address announcer and the drone of jet engines lent an eerie quality to the spectacle, as the sounds rattled against empty seats and hard surfaces. Individual voices from the stands rang out, jarringly clear. The Mets this year have been observing the club’s 50th anniversary, and this hushed atmosphere was certainly conducive to contemplation. On the same date in 1962, the inaugural Mets team lost both games of a doubleheader against the Houston Colt .45s, drawing a total of 1,481 people to the Polo Grounds.