A professional who clocks and records time required for horse leading in race to run specified distance. Responsibilities include:

• Observes signal for official start and activates stopwatch to time race.
• Observes leading horse crossing markers denoting fractional parts and finish line of race to note and record time elapsed.
• Compares recorded results with those obtained by automatic electronic timer and reports difference to racing officials.
• Writes daily report of name, number of leading horse, fractional and total time required for each race to submit to track officials.