Stevie McKenna holds a narrow 54.5% implied probability edge over Owen O’Neill in their eight-round middleweight prelim at Zuffa Boxing 10, driven primarily by McKenna’s elite power (15 knockouts in 16 wins) and recent first-round stoppage form after moving up to middleweight. The competitive balance stems from the all-Irish matchup at Dublin’s 3Arena, where O’Neill’s experience, defensive resilience, and regional familiarity offset McKenna’s aggression despite the latter’s home-crowd advantage and higher knockout ratio. Recent training footage and official fight announcements highlight no major injuries or lineup shifts, keeping sentiment tight; late weigh-in results, ring cuts, or an early McKenna barrage could widen the gap, while O’Neill’s ability to go the distance would sustain close trader pricing.