Complex sentence: His best finish was a 29th at Talladega Superspeedway, but on the bright side, did lead his first career lap under caution in the July race at Daytona International Speedway.
Split into simpler sentences: His best finish was a 29th at Talladega Superspeedway. He also led his first career lap under caution in the July race at Daytona International Speedway.