NEW YORK -- Luis Severino's biggest problem seems to be that nobody knows what's wrong with him.
Least of all himself.
The Yankees' struggling ace was at a loss Monday following yet another terrible performance in a string of them.
This time, it led to an 8-5 loss to the Mets at Yankee Stadium.
Time to panic over Yankees' Luis Severino?
Severino lasted just four innings -- his shortest start of the season -- giving up four earned runs on seven hits, a walk and two home runs, including Amed Rosario's leadoff shot.