Complex sentence: Throughout the season, the Oilers lost various players to injury and illness; at one point, they had 11 players out of the line-up and had to rely on emergency call-ups to fill their roster.
Split into simpler sentences: Throughout the season, the Oilers lost various players to injury and illness. At one point, they had eleven players out of the line-up and had to rely on emergency call-ups to fill their roster.