Fredereric John "Lefty" Baczewski (May 15, 1926 – November 14, 1976) was an American left-handed pitcher in Major League Baseball for the Cincinnati Redlegs and Chicago Cubs.

After some time in the independent minor leagues, Baczewski was purchased from his Shreveport club in October 1949 by the Cubs for $30,000 and a player to be named.

He worked his way up through the Cubs' minor league system and made his debut with the parent club on April 26, 1953.

Baczewski appeared in nine games as a reliever, posting an ERA of 6.30 in ten innings, before he was traded with Bob Kelly to the Reds in exchange for Bubba Church.

In 1955, Baczewski opened the season with the Reds but made just a single relief appearance, allowing 2 runs in one inning on April 16.