Complex sentence: Originally from Frankston YCW, Mace started his VFL career at Hawthorn in 1980 but was unable establish himself as a senior player there so crossed to St Kilda in 1982 where he became a regular in the side for five seasons.
Split into simpler sentences: Originally from Frankston YCW, Mace started his VFL career at Hawthorn. He couldn't establish himself there so crossed to St Kilda in 1982 where he became a regular in the side for five seasons.