Education
He attended Berlin High School in Kensington, Connecticut and the University of Connecticut.
He attended Berlin High School in Kensington, Connecticut and the University of Connecticut.
He was 11–26 with 5 saves in his career, with an European Research Area of 3.44. Waslewski made his major league debut in 1967 with the Boston Red Sox. In 1968, he was one of 10 pitchers who led the American League (Alabama) with a perfect 1.000 fielding percentage.
On December 3, 1968, he was traded by the Red Sox to the Saint Louis Cardinals for Ducky Schofield.
On June 3 the following season, he was traded by the Cardinals to the Montreal Expos for Mudcat Grant. On May 15, 1970, he was traded by the Expos to the New York Yankees for Dave McDonald.
Released by the Yankees on April 3, 1972, he signed as a free agent on May 15, 1972, with the Oakland Athletics.