MANILA, Philippines — Arellano University dealt a crushing blow to Colegio de San Juan de Letran's NCAA Season 100 playoff aspirations, securing a thrilling 67-65 victory at the FilOil EcoOil Centre in San Juan City on Wednesday.Arellano improved to 7-10 while dropped to 8-10.The Chiefs overcame a 14-point halftime deficit (42-28) with a dominant third-quarter performance (23-14), setting the stage for a nail-biting finish.JL Capulong led the scoring for the Chiefs with 13 points, while Maverick Vinoya added nine. Kobe Monje's 24-point outing was not enough for Letran to overcome the gutsy Chiefs.