Complex sentence: MacCachren was nominated for the AARWBA award in 2004 after winning the Laughlin Class Championships (1/2-1600 & Class 12) and SCORE's Laughlin Leap Championship, with his pit crew helping him win the SCORE Laughlin Pit Crew Challenge Championship.
Split into simpler sentences: MacCachren was nominated for the AARWBA award in 2004 after he won the Laughlin Class Championships (1/2-1600 & Class 12) and SCORE's Laughlin Leap Championship. His pit crew helping him win the SCORE Laughlin Pit Crew Challenge Championship.