Baek graduated from Busan High School, Busan, South Korea in 1998. He was signed by the Seattle Mariners as an amateur free agent on September 25, 1998.\n', '

He made his professional with the Peoria Mariners in 1999. In his first start he struck out 8 batters over 5.0 innings on July 18.\n', '

Was 4-1 with a 3.86 ERA in 9 home starts with Wisconsin Timber Rattlers in 2000. He was placed on the disabled list on June 2 with a right arm flexor strain. Baek went 5-3 after coming off the DL June 15. At the end of the season he was listed among Baseball America\'s top-20 Midwest League prospects at the end of the season.\n', '

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