Big3's Reggie Theus Says He Would Choose WNBA Over $5 Mil If He Were Caitlin Clark

Caitlin Clark's got a tough decision ahead of her -- play in the WNBA or take $5 mil to shoot in the Big3 -- but Reggie Theus tells TMZ Sports if he were the Iowa superstar, the choice would be simple ... play in the women's league. We caught up…