The right-hander had entered the transfer portal this year and had interest from the University of Miami, though ultimately would transfer to the SEC and the Alabama Tide. The slot value for the 126th pick in the MLB draft is $609.200. Marionneaux stands 6'3" but is listed only at 163lbs. In his most recent season at Northwestern, he struck out 81 hitters over the span of 84 innings pitched, while sporting a 3.51 ERA on route to making the All-Southland first team. 

According to Baseball America in 2025, Marionneaux lives in the upper-80s and throws mostly fastballs and sliders.