 While pitching for the Rangers, he earned the save for Nolan Ryan's 300th career win against the Milwaukee Brewers in Milwaukee on July 31, 1990 (when the Brewers played in the American League).He played the last game of his Major League career on April 23, 1992, and spent the next two seasons on various minor league teams before retiring.Arnsberg served as pitching coach for the Montreal Expos from 2000 to 2001 and the Florida Marlins in 2002 and 2003, when they won the World Series.