Background
Source: Wikipedia
David Lee Wells (born May 20, 1963) is an American former professional baseball pitcher who played 21 seasons in Major League Baseball (MLB) for nine teams, most notably the Toronto Blue Jays and New York Yankees. Nicknamed "Boomer", Wells was considered one of the league's top left-handed pitchers during his career and made three All-Star appearances. In 1998, he pitched the 15th perfect game in baseball history.