Grabowksi graduated from Kearny High School of Kearny, New Jersey in 1953. In 1999, he was named by The Star-Ledger as one of the top ten New Jersey high school soccer players of the 1940s-1960s. He spent at least one season with the Elizabeth Falcons of the American Soccer League (ASL) as he led the ASL in scoring with 19 goals during the 1955-1956 season. That season, the Falcons lost the championship game to Uhrik Truckers.
Grabowski earned one caps with the U.S. national team on April 7, 1957. That game, a 7-0 loss to Mexico was a qualifier for the 1958 FIFA World Cup. Grabowski also scored one goal with the U.S. in its 7-2 victory over Haiti in the 1959 Pan American Games. The U.S. took the bronze medals at those games, which are not recognized internationals.
- Jandoli, Ron. "The Century's Best -- Boys Soccer: Top 10 Players of each decade", The Star-Ledger, November 7, 1999, backed up by the Internet Archive as of January 10, 2003. Accessed September 11, 2008.
- The Year in American Soccer - 1956
- USA - Details of International Matches 1885-1969
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