COMPLETE PANE OF 20 NEW POSTAGE STAMPS. ~ Issued in 2006 commemorating these four Baseball Sluggers. Most players only get a hit 25 percent of the time (a batting average of .250). The ballplayers honored on the "Baseball Sluggers" stamps all have higher batting averages: Roy Campanella - .276; Hank Greenberg - .313; Mel Ott - .304; and Mickey Mantle - .298. Philadelphia native Roy Campanella was a catcher in the American Negro Leagues and Major League Baseball. Campanella signed a Brooklyn Dodgers' contract in 1946. A smart and skilled catcher, he was also impressive at-bat. He averaged more than 85 runs-batted-in per year over the course of his career. Campanella played every All-Star Game from 1949 to 1956 and was in 5 World Series. In 1969, he was the second African-American player inducted into the Baseball Hall of Fame. After a car accident in 1958, Roy Campanella was paralyzed from the chest down and confined to a wheelchair for the rest of his life. Henry Benjamin Greenberg, baseball's first Jewish superstar, born in New York. A powerful slugger, Greenberg earned the nickname "Hammerin' Hank." Even though he had only nine full seasons, he had a career total of 331 home runs and averaged more than 141 runs-batted-in per year played. Melvin Thomas Ott was born in Gretna, Louisiana. Ott stayed with the Giants 22 seasons, playing in three World Series. He was an All-Star every year from 1934 to 1945. When he retired, he had 511 career home runs, the first National Leaguer to hit 500. Mickey Mantle hit 536 home runs and averaged 83 runs-batted-in per year over the course of his career. His father named him in honor of baseball great Mickey Cochrane and taught him to hit right- and left-handed. That strength enabled him to hit long home runs. Mantle played 18 years for the New York Yankees. He was in 16 All-Star games and seven World Series