Making his big league debut, McLean shut out the Seattle Mariners over 5 1/3 innings on Saturday afternoon at Citi Field in a 3-1 win, navigating a deep lineup with an array of spinning breaking pitches. It was an impressive outing for the rookie right-hander, but when manager Carlos Mendoza went out to the mound in the sixth, fans booed the move.

Nolan McLean is as advertised. In fact, in his MLB debut, he had a start only matched by one of the most-hyped young pitchers in Mets history. McLean went 5.1 innings on Saturday and struck out eight without allowing a run.

Mets starter Nolan McLean makes a casual behind-the-back play to close the top of the third in his MLB debut.