Complex sentence: Michael Andretti led most laps and battled Mears for the win in the closing laps, executing a daring pass for the lead on the outside of turn one on lap 187.
Split into simpler sentences: Michael Andretti led most the laps during the race and battled Rick Mears for the win in the closing laps. Andretti executed a daring pass for the lead on the outside of turn one on lap 187.