PORT ST. LUCIE — Always working to get better.
That’s how you win two straight Cy Young awards. That’s also the first step to winning a third straight Cy Young Award.
Jacob deGrom, 31, is perfecting a backdoor slider this spring. He threw a perfect one to teammate Brandon Nimmo for a called third strike Tuesday during his two innings of work in a simulated game at Clover Park.
DeGrom will get on the mound Sunday for the first time in a spring training game against the Nationals.
Look out for the backdoor slider.
Nimmo never saw it coming. He thought it was going to be a fastball out of the zone, then the ball darted back over the plate at the last second.
To truly believe what he just saw, Nimmo had to run to TrackMan to follow the path of the pitch. As he told The Post what his eyes and TrackMan both saw, he held his thumb and forefinger about a quarter of an inch apart to reveal how the pitch had been thrown with precision.
“Right on the black, he’s on a different level,’’ Nimmo said. “His slider doesn’t have an eye. You are flying blind on that pitch.’’
The pitch looked like a fastball until it broke across the…