Complex sentence: He was a front-row forward who captained the national team in two Tests against New Zealand in 1963 and who captained-coached a number of his club sides during a record length career playing in the top-grade for twenty seasons from 1948 to 1967.
Split into simpler sentences: He was a front-row forward who captained the national team in two Tests against New Zealand in 1963 and who captained-coached a number of his club sides. He enjoyed a record-breaking length career playing in the top-grade for twenty seasons from 1948 to 1967.