Thailand’s Prayad Marksaeng, the SMBC Singapore Open champion in 2017, just keeps on winning. A week after a 10th place finish in the The Senior Open at St Andrews, Scotland, Prayad won his fourth title of 2018 on the Japan Senior Tour with victory in the Maruhan Cup Taiheiyo Club Seniors Tournament. The win in the 36-hole event was Prayad’s …