Complex sentence: A series of studies of possible new cities concluded that San Antonio could not support a USFL team, but a heavy sales pitch by oilman Manges, plus the desire to give the Houston Gamblers a rival, persuaded the owners to give a franchise to San Antonio.
Split into simpler sentences: A series of studies of possible new cities concluded that San Antonio could not support a USFL team. However, a heavy sales pitch by oilman Manges, plus the desire to give the Houston Gamblers a rival, persuaded the owners to give a franchise to San Antonio.