Pedzisa mutsara unotevera: Akatonga mitambo yechikwata chikuru inenge 2 764 mumakore ake 20. Akatonga mumitambo miviri yeWorld Series (1975 na1981), mitambo miviri yeAll-Star (1977 na1987) uye mishanu yeNational League Championship Series (1971,
1976, 1979, 1983, uye 1985). Stello akanga ari murayiridzi paAl Somers Umpire School.