He often opened the bowling with Bart King when playing for the Philadelphian cricket team and the USA national team. He played 53 first-class matches in all, taking 199 wickets in his career at an average of 21.97, taking 10 wickets in a match four times, and having an innings best of 8/91 against Worcestershire in 1903. The Australian Test spin bowler Arthur Mailey said that by the way Clark imparted spin to the ball he "was able to vary the length of swerve or dictate at which point in its flight the ball would begin to change its course".
Clark frequently started his bowling with Bart King for both the Philadelphia cricket team and the USA national squad. He played 53 first-class matches, taking a total of 199 wickets at an average of 21.97 per match, including four occasions where he took 10 wickets in a game. His best performance was 8/91 against Worcestershire in 1903. Arthur Mailey, the Australian Test spin bowler, observed that Clark's bowling technique allowed him to control the ball's swerve and dictate its trajectory.