Grzanich was born in Canton, Illinois, on August 24, 1972. He attended Lewistown High School and Parkland College.\n', '

Grzanich was a 19th-round draft pick of the Houston Astros during the 1992 MLB draft. He made his professional debut for the GCL Astros last that year, posting a 2–5 record and an earned run average of 4.54 in 17 appearances.\n', '

In 1993, Grzanich was promoted to the Single–A Auburn Astros of the New York–Penn League. He made 14 starts, with a 5–8 record and a 4.82 ERA. He also struck out 71 batters in 93.1 innings.\n', '

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