Complex sentence: Long serving catcher and NPB appearance record holder, Motonobu Tanishige became manager of the Dragons while still playing professionally in 2013 and then retired in 2015 to focus on managing the team.
Split into simpler sentences: Long serving catcher and NPB appearance record holder Motonobu Tanishige became manager of the Dragons while still playing professionally in 2013. He retired in 2015 to focus on managing the team.