[2] Exciminiano played collegiate basketball at FEU where he established himself as defensive stopper, while serving as backup to Terrence Romeo and RR Garcia.
[4] During his rookie season, he struggled to get some playing time as a third-string shooting guard to Cyrus Baguio and Dondon Hontiveros and was shuffled in an out of Alaska's active roster.
However, in his sophomore season, he became one of coach Alex Compton's reliable energy guys off the bench as Alaska veered away from the triangle offense and adopted the fast-paced, full court-pressing system.
He typified his role during the 2015–16 PBA Philippine Cup semifinals against GlobalPort when he was assigned to defend Terrence Romeo.
[10] A month later, with the blessing of TNT,[11] he was signed up by the KCS Computer Specialist–Mandaue to play in the Visayas leg of the first season of the Pilipinas VisMin Super Cup.