"Rowdy" Roddy Piper's daughter is following in the footsteps of her legendary father -- becoming a professional wrestler -- and her only regret is he isn't here to watch her perform.

TMZ Sports talked to Teal Piper (real name Ariel Teal Toombs) ... who at 34 years old will make her wrestling debut for AEW on August 31.

"A million percent regret not taking this opportunity before," ... Piper told us ... adding, "It is very heartbreaking, and very nostalgic and intense feeling being in this world without him."

Roddy unexpectedly passed away back in July 2015 ... at the age of 61.

Teal says her dad woulda been pumped about her gettin' in the biz ... but also protective over his daughter.

"I think my dad would be very excited for me. He's always been so supportive of the stuff I do."

"But, on the flip side of that, he's always kept me far away from wrestling. He was always worried about the heat he would get as a heel, the fans in the industry, so he kept me and my sister, specifically, in a bubble."

Piper's in the deep end now ... 'cause her first match is a 21-woman Casino Battle Royal -- with the winner getting a title shot.