Complex sentence: In 1975, Jim McKay and Dave Marr became the lead broadcast team, while Bob Rosburg joined the network as the first ever on-course reporter, and Peter Alliss joined as a co-anchor.
Split into simpler sentences: In 1975, Jim McKay and Dave Marr became the lead broadcast team. Also that year, Bob Rosburg joined as the first ever on-course reporter, and Peter Alliss joined as a co-anchor.