Complex sentence: Kaku played in the Chinese Professional Baseball League from 1997 to 1998, and participated in the preliminary rounds of the 2000 Summer Olympics with the Taiwanese national team in 1999 at the age of 42.
Split into simpler sentences: Kaku played in the Chinese Professional Baseball League from 1997 to 1998,. He also participated in the preliminary rounds of the 2000 Summer Olympics with the Taiwanese national team in 1999 at the age of 42.