The 2013 season is Sandy Alderson’s final Mulligan.

This is the last year the Mets general manager gets to explain away a worsening major league product in the name of cleansing the old, building the new and waiting for money to drop from heaven — or at least from a Wilpon.

The patience extended the Alderson regime, in general, is greater than most in his position receive around here. Consider Brian Cashman’s Yankees have made the playoffs

14 of his 15 years as GM, including last season when they had the AL’s best record and actually won a playoff round.

Yet, if, say, my email were a barometer, you would think the Pittsburgh Pirates play in The Bronx.

Alderson took a 79-win team that got Omar Minaya fired and turned it into a 77-win team, then a 74-win team. And it would surprise few watching the Mets this spring if they won 73 or fewer in 2013.