A pizzeria worker was fatally stabbed in the heart near Claremont Park in The Bronx yesterday, cops said.

Hansell Arias, 22, was knifed in the parking lot of a McDonald’s at 1625 Webster Ave. and staggered toward the park before collapsing in a pool of blood at about 2:15 a.m.

Arias was rushed to Lincoln Hospital, where he underwent emergency surgery but was pronounced dead.