Complex sentence: When Montazeri joined Umm Salal, the club was in danger of relegation, but under the experience and leadership of Montazeri, Umm Salal avoided relegation and finished a solid 7th place.
Split into simpler sentences: When Montazeri joined Umm Salal the club was in danger of relegation. But, under the experience and leadership of Montazeri, Umm Salal avoided relegation and finished a solid 7th place.