Complex sentence: In 2009, while Jerry Remy took an indefinite leave of absence due to illness, Dennis Eckersley performed the color commentary for home games and Dave Roberts provided commentary for most road games.
Split into simpler sentences: In 2009, Jerry Remy took an indefinite leave of absence due to illness. During that season, Dennis Eckersley performed the color commentary for home games and Dave Roberts provided commentary for most road games.