Rian Michael S. Ayonayon (born December 8, 1992) is a Filipino professional basketball player for the Abra Solid North Weavers of the Maharlika Pilipinas Basketball League (MPBL). He was drafted 3rd overall pick in the 1st round of the 2019 PBA draft.
Ayonayon was drafted third during the first round of the 2019 PBA draft.
On November 16, 2021, he was traded to the Blackwater Bossing along with Will McAloney in exchange for Marion Magat.
On June 21, 2025, Ayonayon signed with the Abra Solid North Weavers.
As of the end of 2023âÂÂ24 season
|- | align=left | | align=left |NLEX | 11 || 18.6 || .296 || .214 || || .647 || 2.5 || 2.4 || .4 || .1 || 5.4 |- | align=left rowspan=2| | align=left | NLEX | rowspan=2|11 || rowspan=2|7.7 || rowspan=2|.286 || rowspan=2|.125 || rowspan=2| || rowspan=2|.778 || rowspan=2|1.1 || rowspan=2|.8 || rowspan=2|.1 || rowspan=2|.1 || rowspan=2|2.2 |- | align=left | Blackwater |- | align=left | | align=left | Blackwater | 26 || 11.1 || .435 || .345 || || .652 || 1.1 || 1.2 || .6 || || 5.2 |- | align=left | | align=left | Blackwater | 8 || 17.8 || .500 || .367 || || .583 || 1.9 || 1.6 || .3 || .1 || 9.0 |- | align=left | | align=left | Blackwater | 17 || 14.4 || .424 || .333 || .000 || .700 || 1.6 || 1.4 || .2 || .1 || 5.8 |-class=sortbottom | align="center" colspan=2 | Career | 73 || 13.2 || .403 || .313 || .000 || .662 || 1.5 || 1.4 || .4 || .1 || 5.3