Spherical II between Adrian Peterson and his poker rival appears like it’s going to, in actual fact, go down inside a hoop … as TMZ Sports activities has discovered the NFL legend’s adversary has signed a contract with Superstar Boxing.

The promotion’s founder, Damon Feldman, tells us … Joe “Child Joe” Castaneda agreed to a scrap with Peterson this week — and formally put pen to a pact on Tuesday.

Peterson’s but to ink his deal … however Feldman tells us he is anticipating that to occur quickly.

It, after all, will likely be a rematch from Might 27 — when the fellows duked it out at a social membership in Houston, Texas over a hand of playing cards.

Castaneda informed us Peterson had been trash-talking one in every of his associates whereas sitting on the felt … and when he known as for the ex-Vikings operating again to cease, “that is when the melee sort of broke out.”

Each guys have been injured within the dispute, however they’ve every admitted they haven’t any lingering dangerous blood towards each other — which finally appears to have paved the way in which for his or her upcoming bout in between the ropes.

No combat night time date has been set simply but … however Castaneda stated in a press release to us on Tuesday, “Time to get in form and sharpening up these fingers to placed on a present!!!”