If you're among those human beans who can get it together enough to send baseball cards for signatures through the mail, this is the best possible time to do so.
Here's a current link to addresses for Cactus League teams. Here's the address link for Grapefruit League teams, including our hapless, flummoxworthy, captivating Mets. Their first game is March 2 in Port St. Lucie
it won't matter how long the player takes to return your card if you rely on these.
There are eleven ballparks in Arizona. Maybe this year, Lord willin' and the creek don't rise, we'll see you at one of them.