Complex sentence: Reiser, the team owner, ran Chevrolets through the 2001 season and since then, the 17 car has run part-time with a variety of different sponsors, with Kenseth at least co-driving each time.
Split into simpler sentences: Reiser, the team owner, ran Chevrolets through the 2001 season. Since then, the 17 car has run part-time with a variety of different sponsors, with Kenseth at least co-driving each time.