Leading into the start of training camp (rookies reported July 22, veterans July 24) The Post will provide Giants fans with a position-by-position look at the roster.

Programs, get your programs! Having a numerical and alphabetical roster nearby is essential in figuring out who is manning the back end of this defense. Not long ago, Landon Collins was considered a fixture in the secondary, but the new regime did not deem him worth big money and he signed with the Redskins. That leaves mercurial cornerback Janoris “call me Jackrabbit” Jenkins as the only established returning player. The all-new safety tandem: Old veteran Antoine Bethea came via free agency and much-less-old veteran Jabrill Peppers arrived in the trade that sent Odell Beckham Jr. to Cleveland. The draft yielded three rookie corners and all might see time on the field.

Key returnees: Janoris Jenkins, Michael Thomas, Grant Haley, Sam Beal

Key additions: Jabrill Peppers, Antoine Bethea, DeAndre Baker, Julian Love, Corey Ballentine

The rundown: Beal is listed as a returnee only because he technically is, having spent his entire rookie season on injured reserve and thus awaiting his NFL debut. He is part of a strikingly young group that will be counted on to grow up in a hurry. The Giants traded up into the first round of the draft to get Baker, an undersized, feisty competitor from Georgia who went 28 consecutive college games without allowing a touchdown. Love, taken in the fourth round out of Notre Dame, will challenge for the nickel back job but Haley cannot be dismissed, given his chip-on-the-shoulder toughness. Jenkins is thrust into a leadership role with all the fuzzy-cheeked corners and raise your hand if you ever saw this career direction for Jackrabbit, a favorite of coach Pat Shurmur (showing opposites can attract).

Bethea is 34 and entering his 14th NFL season, having displayed remarkable durability in 2018 with the Cardinals. At free safety, he will be the quarterback on the back end. Peppers, 23, filled a hybrid role at Michigan and during the past two seasons with the Browns; the Giants believe he is a star waiting to go nova.

Baker and Beal will duel for the outside starting spot opposite Jenkins, and do not be surprised if Baker lines up with the first team Sept. 8 against the Cowboys. Baker is not a workout warrior with all the metrics that some teams adore. He is a baller with the perfect “move-onto-the-next-play’’ mindset required of all top cover guys. Beal, taken in the 2018 supplemental draft, has great length and confidence and is a real wild card here. This defense needs him to earn playing time. Love is at home in the slot, but so is Haley: May the better nickel back win. Thomas, 29, should be safe — he is excellent on special teams — but cannot falter, with Sean Chandler hoping to stick again.

The verdict: This position has great upside and worrisome bust potential. The moves might be a big hit or a swing and a miss. The cornerbacks, other than Jenkins, are talented but inexperienced, so growing pains must be anticipated. Getting Curtis Riley out of the free safety spot he started in last season is a huge plus — he devised more bad angles than a lousy movie script. Baker and Peppers have to come up big, or else.