Complex sentence: The Seattle Mariners' 2001 season was the 25th since franchise inception, and ended with the Mariners winning their third American League West division title, with a record of 116-46.
Split into simpler sentences: The Seattle Mariners' 2001 season was the 25th since franchise inception. Nevertheless, the season ended with the Mariners winning their third American League West division title, with a record of 116-46.