Complex sentence: On his 8-yard touchdown pass his shoulder was injured (noticeable by his unenthusiastic post-score celebratory dance) and, even though he continued to play, appeared to be in pain.
Split into simpler sentences: On his 8-yard touchdown reception, he appeared to have an injured shoulder (made noticeable by his unenthusiastic post-score celebratory dance). Even though he continued to play, he appeared to be in pain.