Is it a dead ball if it hits the umpire?

Is it a dead ball if it hits the umpire? Rule 5.09(f) Comment: If a fair ball touches an umpire working in the infield after it has bounded past, or over, the pitcher, it is a dead ball.

Rule 5.09(f) Comment: If a fair ball touches an umpire working in the infield after it has bounded past, or over, the pitcher, it is a dead ball.