Complex sentence: Climax's record label, Rocky Road Records was owned by Marc Gordon who was also managing the Fifth Dimension which in retrospect hampered Climax's follow up Life & Breath and future singles.
Split into simpler sentences: Climax's record label, Rocky Road Records was owned by Marc Gordon who was also managing the Fifth Dimension at the time. In retrospect Gordon's plate was full managing a super group and most likely hampered Climax's follow up "Life & Breath" and future singles.