Al Clark is a former professional baseball umpire who worked in the American League from 1976 to 1999, and throughout both Major Leagues in 2000 and 2001. Clark umpired 3,392 major league games in his 26-year career. He umpired in two World Series (1983 and 1989), two All-Star Games (1984 and 1995), five American League Championship Series (1979, 1982, 1987, 1992 and 1999), and three American League Division Series (1981, 1996 and 2000). Clark also umpired for Cal Ripken, Jr.'s 2,130 and 2,131 games.

This chest protector was signed in silver by Clark and inscribed, "MLB Umpire 1976-2001", "H.P. Umpire - Game 2130", "3rd Baseb Umpire - Game 2131", "1st Base Umpire Opening Day Camden Yards April 3, 1992." This item includes a Great Moments hologram and COA.