Complex sentence: Lemieux's career was plagued by health problems that limited him to 915 of a possible 1,428 games, between his NHL debut on October 11th, 1984, and his final game on December 16th, 2005.
Split into simpler sentences: Lemieux's career was plagued by health problems that limited him to 915 of a possible 1,428 games, between the opening of the 1984-85 season, and the close of the 2005-2006 season. His NHL debut was on October 11th, 1984, and his final game December 16th, 2005.