Dominic Smith’s Mets prove-it moment may be here

Andy Marlin | USA TODAY SportsDominic Smith’s career took a big hit a week ago.

Now the moment he has yearned for might be upon us.

The Mets are holding their breath after slugger Pete Alonso left Tuesday’s loss in San Diego after taking a pitch to his hand. X-rays were negative, but manager Buck Showalter wasn’t exactly celebrating after the game. It seems likely Alonso is going to miss a few games at best.

If Alonso is out for an extended period — and remember, outfielder Starling Marte also got hurt — the Mets will be without their best player. And there is no obvious fill-in currently on the roster. Mark Canha and J.D. Davis can play at first base, but they are unlikely to be steady…