"High stamina" means having a lot of energy and endurance to keep doing physical or mental activities for a long period of time without getting tired easily. Full definition
It's imperative that you have someone with high stamina, tackling, crossing, marking and speed attributes as they will take part in all phases of play. (squawka.com)
It has very high stamina once at max level. (cheatcc.com)
Keeping up your mobility will have high stamina costs, but it's worth it. (vg247.com)