Complex sentence: They moved to their current ground of Recreation Park from the Fatten Pasture ground in 1928 the clubs only success while playing at Fatten Pasture was winning the 1921-22 Monkwearmouth Cup.
Split into simpler sentences: They moved to Recreation Park from the Fatten Pasture ground in 1928. The clubs only success while playing at Fatten Pasture was winning the 1921-22 Monkwearmouth Cup.