The Cubs selected Marionneaux with the No. 126 overall pick in the 2026 First-Year Player Draft.
Marionneaux may end up being a cost-saving pick for the Cubs, as he was not ranked by Baseball America or MLB Pipeline before the draft. The Northwestern State product logged a 3.51 ERA, 1.09 WHIP and 81:18 K:BB in 84.2 innings this spring.