As the World Baseball Classic kicks off, fantasy baseball managers face a crucial question: should they avoid drafting WBC participants? Historical data reveals surprising insights about the tournament's impact on player performance. While hitting statistics show virtually no difference between WBC and non-WBC participants, starting pitchers face a more complex picture.

Analysis of the past five WBC tournaments shows that top-200 fantasy starting pitchers who participated experienced a 1.58-point per game decline in production compared to the previous season. Their ERAs rose by 0.54 runs, and they averaged 26.8 fewer innings pitched. This downturn stems from pitchers ramping up their workload earlier than usual, potentially increasing injury risk and affecting performance during the critical early-season stretch.

The data suggests fantasy managers should exercise cautious optimism with WBC pitchers. While several high-profile pitchers like Sandy Alcantara and Yu Darvish struggled after WBC participation, many rebounded later in the season. The key is monitoring WBC usage and spring training returns before drafting. Hitters show no significant impact, making WBC participation largely irrelevant for position players when setting draft strategies.