Complex sentence: On December 18, he was traded to the Colorado Rockies and the next day he was traded to the Red Sox for first baseman Scott Hatteberg, but the Red Sox did not tender him a contract, making him a free agent two days later.
Split into simpler sentences: On December 18, he was traded to the Colorado Rockies. The next day, he was traded to the Red Sox for first baseman Scott Hatteberg, but the Red Sox did not tender him a contract, making him a free agent two days later.