Today is the day.

Fans of some teams — cough, Mets, cough — may be dreading how it will deplete their rosters, while in other corners — the Yankees? — there is excitement over the potential arrival of roster upgrades.

With the MLB trade deadline clock ticking down to 6 p.m. ET on Tuesday afternoon, we have come up with five of the biggest questions to be answered today.

What happens in the second half of the baseball season and October may depend on how they’re answered.