In 2018, the former State Representative for District 17, Brian Renegar was unable to run for reelection due to term limits,[4] and Grego ran for the open seat.

Grego came in second in a five-way Republican primary, advancing to a runoff against Joshua Hass, which he won.

[1] As of July 2020, Grego sits on the following committees:[5] In 2024, Grego co-authored House bill 3749[6] and Senate bill 1427,[7] along with Senator Warren Hamilton to carve out 8.3 million dollars to bring back the Oklahoma State Penitentiary Rodeo, despite others, such as a representative of the Arnall Family Foundation, calling out the move as exploitative and dangerous toward the inmates and animals and a waste of funds that could be spent on reforms.

"[10] ODOC Executive Director Steve Harpe claims that it would bring in revenue for the department and support functions like a call center, and that Netflix, ESPN, and PBR are eyeing Oklahoma because of it.

[11] Efforts for the rodeo revival stemmed father back than 2024, and 2023, George Young said that taxpayer dollars being used to revive the rodeo could be better spent on education programs for inmates or initiatives to improve prison health care.