Billy Mamaril

John Billy San Luis Mamaril (born June 25, 1980) is a Filipino-American former professional basketball player who last played for the San Miguel Beermen of the Philippine Basketball Association (PBA). He plays the forward and center positions. Like his father, former PBA player and Barangay Ginebra Kings slotman Romy "Mama" Mamaril, he is known for his physical and rugged defense. He played 17 seasons in the Philippine Basketball Association.

Career
Mamaril is a shotblock artist and a good lowpost operator. During his tenure with the Purefoods TJ Hotdogs, the defunct Shell Turbo Chargers, and the Coca-Cola Tigers, he contributed solid numbers and quality minutes. He was also part of one of the most controversial trades in PBA history involving Rafi Reavis, Rudy Hatfield, Aries Dimaunahan, and Ervin Sotto.

On June 11, 2010, he was traded to the Air21 Express for Mike Cortez but then returned to Ginebra for a future pick.

On April 6, 2015, Mamaril was traded by Ginebra to the GlobalPort Batang Pier for Dave Marcelo after Frankie Lim was hired by Barangay Ginebra as the team's head coach. Marcelo played college basketball for San Beda Red Lions, where he played under coach Lim. The trade was a part of a 4-team trade that also involved Ginebra's sister team, San Miguel and Barako Bull.

In October 2022, it was reported that Mamaril has retired from professional basketball to pursue becoming a nurse.

Season-by-season averages

 * align=left |
 * align=left | Purefoods
 * 36 || 22.6 || .511 || .000 || .525 || 4.8 || .6 || .4 || .6 || 6.1
 * align=left |
 * align=left | Shell
 * 73 || 30.3 || .386 || .000 || .515 || 6.0 || 1.8 || .9 || 1.4 || 9.0
 * align=left |
 * align=left | Coca-Cola
 * 38 || 24.3 || .363 || .000 || .576 || 5.1 || 1.0 || .5 || 1.2 || 7.6
 * align=left |
 * align=left | Barangay Ginebra
 * 52 || 16.2 || .449 || — || .586 || 3.6 || .6 || .2 || .4 || 5.2
 * align=left |
 * align=left | Barangay Ginebra
 * 48 || 20.3 || .422 || — || .625 || 4.0 || .8 || .3 || .7 || 5.6
 * align=left |
 * align=left | Barangay Ginebra
 * 41 || 18.3 || .484 || .000 || .632 || 3.9 || .5 || .4 || .7 || 6.4
 * align=left rowspan=2|
 * align=left | Barangay Ginebra
 * rowspan=2|32 || rowspan=2|17.0 || rowspan=2|.479 || rowspan=2|— || rowspan=2|.471 || rowspan=2|4.8 || rowspan=2|.7 || rowspan=2|.4 || rowspan=2|.6 || rowspan=2|5.3
 * align=left | Air21
 * align=left |
 * align=left | Barangay Ginebra
 * 38 || 14.0 || .444 || .000 || .444 || 3.1 || .8 || .4 || .5 || 3.8
 * align=left |
 * align=left | Barangay Ginebra
 * 31 || 13.3 || .427 || — || .565 || 3.2 || .7 || .5 || .3 || 2.9
 * align=left |
 * align=left | Barangay Ginebra
 * 46 || 17.7 || .467 || — || .549 || 4.4 || .5 || .5 || .6 || 5.5
 * align=left |
 * align=left | Barangay Ginebra
 * 34 || 9.6 || .385 || — || .531 || 1.9 || .4 || .1 || .2 || 2.3
 * align=left rowspan=2|
 * align=left | Barangay Ginebra
 * rowspan=2|32 || rowspan=2|15.8 || rowspan=2|.433 || rowspan=2|.000 || rowspan=2|.488 || rowspan=2|3.8 || rowspan=2|.8 || rowspan=2|.2 || rowspan=2|1.0 || rowspan=2|4.1
 * align=left | GlobalPort
 * align=left |
 * align=left | GlobalPort
 * 38 || 19.0 || .470 || .000 || .667 || 4.2 || 1.1 || .6 || .8 || 5.1
 * align=left |
 * align=left | GlobalPort
 * 34 || 15.7 || .343 || — || .429 || 2.8 || .6 || .4 || .5 || 2.5
 * align=left |
 * align=left | San Miguel
 * 25 || 4.7 || .440 || — || .571 || .8 || .2 || .0 || .1 || 1.0
 * align=left |
 * align=left | San Miguel
 * 10 || 4.1 || .143 || — || — || .6 || .1 || .0 || .2 || .2
 * align=left |
 * align=left | San Miguel
 * 10 || 9.3 || .222 || — || .671 || 2.3 || .1 || .0 || .4 || 1.6
 * -class=sortbottom
 * align="center" colspan=2 | Career
 * 618 || 18.1 || .424 || .000 || .553 || 3.9 || .8 || .4 || .7 || 5.1
 * align=left |
 * align=left | GlobalPort
 * 34 || 15.7 || .343 || — || .429 || 2.8 || .6 || .4 || .5 || 2.5
 * align=left |
 * align=left | San Miguel
 * 25 || 4.7 || .440 || — || .571 || .8 || .2 || .0 || .1 || 1.0
 * align=left |
 * align=left | San Miguel
 * 10 || 4.1 || .143 || — || — || .6 || .1 || .0 || .2 || .2
 * align=left |
 * align=left | San Miguel
 * 10 || 9.3 || .222 || — || .671 || 2.3 || .1 || .0 || .4 || 1.6
 * -class=sortbottom
 * align="center" colspan=2 | Career
 * 618 || 18.1 || .424 || .000 || .553 || 3.9 || .8 || .4 || .7 || 5.1
 * 10 || 9.3 || .222 || — || .671 || 2.3 || .1 || .0 || .4 || 1.6
 * -class=sortbottom
 * align="center" colspan=2 | Career
 * 618 || 18.1 || .424 || .000 || .553 || 3.9 || .8 || .4 || .7 || 5.1