Dan Palyo supports betting the under on Luis F. Castillo's 3.5 strikeout prop. Castillo, a 30-year-old journeyman, struggled badly in his season debut with an 11% strikeout rate, 11% walk rate, and low 5.9% swinging strike rate. Throwing only 68 pitches in his first outing, evidence points him either not fully stretched out or having a notably short leash. Palyo sees limited upside today, predicting that a strong Astros lineup will end Castillo's day early, alleviating any over bets on his prop.