Identify how you’re using sport peppers (pizza topping, sandwich layering, or snacking) and whether you need crunch or just flavor.
Choose a substitute from the list by closest heat: pepperoncini for closest tang, banana peppers for mildness, pickled jalapeños or giardiniera for more bite.
Use the ratio for slicing/swapping; if the substitute is very wet (jarred), drain and pat dry to keep your topping from getting soggy.
Adjust to match sport peppers: add a small pinch of red pepper flakes to increase heat, or a tiny splash of vinegar/brine to increase tang.
Taste on your exact dish (not just a spoon) and tweak one variable at a time so the final balance stays right.