Number of Strikes Among White Pitchers (IMAGE) Southern Methodist University Caption In non-monitored ballparks, white pitchers facing matched-race umpires will have 0.25% higher called strike probability than if they face non-matched-race umpires. In monitored ballparks, white pitchers facing matched-race umpires will have .33% lower called strike probability than if they face non-matched-race umpires. Credit Johan Sulaeman, Southern Methodist University Usage Restrictions None. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.