Embracing past shows reason deGrom must be Mets’ future

Al Leiter, Jacob DeGrom, John Franco Getty Images (3)PORT ST. LUCIE — The Mets named two of the best pitchers in their history — John Franco and Al Leiter — to advisory jobs Monday. Now, come take the journey on why that reasserts the need for the organization to figure out how to get Jacob deGrom locked up long term.

You may need some Dramamine. There will be some twists until I get there.

Franco, who already was working for the Mets as a club ambassador, and Leiter, who recently left the YES Network, were designated as baseball operations advisers. Brodie Van Wagenen described roles that would involve going through the minors to help particularly pitchers develop the mindset to succeed not…