Complex sentence: Jenkins is widely known for his tenure with Ring of Honor (ROH) where he became a three-time ROH World Champion, and was the first wrestler to achieve this feat. In addition, he is a one-time ROH World Television Champion.
Split into simpler sentences: Jenkins is widely known for his tenure with Ring of Honor (ROH). When he performed for ROH, he became a three-time ROH World Champion, and was the first wrestler to achieve this feat. In addition, he is a one-time ROH World Television Champion.