Personal:
- Born in Mapleton, Utah
- Parents are Al and Maria Ruiz
- Has one brother, Kalikiano
- Kai and his brother were teammates at Maple Mountain High School during the school's two 4A High School Championships
Before BYU:
- Prepped at Maple Mountain High School in Spanish Fork, Utah
- Four-time letter winner in golf
- First Team All-Region and All-State in golf all four years
- Region golf medalist as a sophomore, junior and senior
- Utah 4A High School golf medalist as a senior
- Won two Utah State 4A High School Golf State Championships in 2012 and 2014
Prior Tournaments:
- Tied for second at the 2013 Salt Lake City Open
- Placed third at the 2014 Winterchamps UGA event
- Placed fourth at the 2014 Art City Amateur UGA event
- Placed fourth at the 2014 Provo Open
- Tied for 49th at the Pacific Coast Amateur
- Tied for seventh at the Junior America Cup
- Semifinalist in the 2014 Utah State Amateur
- Quarterfinalist in the 2015 Utah State Amateur
- Played in the Callaway Junior World MC
- Won the Junior World Qual. and Optimist Qual. medals
Stats
2015-16 Freshman
| Tournament | Round 1 | Round 2 | Round 3 | Total Score | To-Par | Place |
| Saint Mary's Invitational | 78 | 79 | 77 | 234 | +21 | T75/83 |
| Husky Invitational | 78 | 79 | 78 | 235 | +22 | T63/68 |
| Pacific Invitational | 83 | 69 | 72 | 223 | +10 | T32/88 |
| Southwestern Jones Invtl. | 80 | 77 | 75 | 232 | +16 | 66/80 |
| Lamkin Invitational | 76 | 75 | 78 | 229 | +13 | T48 |
| Desert Shootout | 68 | 74 | 76 | 218 | +2 | 62/116 |
| The Goodwin | 76 | 73 | 71 | 220 | +10 | T70/138 |
BYU Career Stats
| Season | Events | Rounds | Strokes | Average | Low Rd. | Top 20 |
| 2015-16 | 7 | 21 | 1,591 | 75.76 | 68 | - |
| Total | 7 | 21 | 1,591 | 75.76 | 68 | - |