Complex sentence: Nogueira spent six seasons in the North American Soccer League, but gained his greatest recognition in over twenty seasons in three indoor leagues, the Major Indoor Soccer League, National Professional Soccer League and the second Major Indoor Soccer League.
Split into simpler sentences: Nogueira spent six seasons in the North American Soccer League, but gained his greatest recognition as an indoor soccer player. He spent over twenty seasons in three indoor leagues, Major Indoor Soccer League, the National Professional Soccer League and the second Major Indoor Soccer League.