Game log · Week-by-week
2026 season · 1 game
| Wk | Opp | TKL | SOLO | TFL | SACK | INT | PD | Note |
|---|---|---|---|---|---|---|---|---|
| Wk 1 | W 45-24@ California | 1 | 1 | 0.0 | 0.0 | — | 0 | Season-high 1 tackles |
| Total | 1 | 1 | 0.0 | 0.0 | — | 0 |
#28
Mason Rivera
Senior defensive back on UCLA's 2026 roster.
6′0″ · 190 lb · Tracy, CA · Kimball HS / Cal Poly
Returning to UCLA for 2026
The story
4 defensive back on UCLA's 2026 roster.
- Signed with Cal Poly in 2022.
Mason Rivera
The receipt on tape: 1 tackles against California, Week 1, 2026.
1 TACKLES · 0 SACKS
Low coverage — composed from the verified record.
- season totals
- game log
His career
2022
- Signed with Cal Polyout of Kimball
Career arc
HS
Recruit
—
CFB
College
UCLA
NFL
NFL Draft
—
2026 snapshot
Season context · Team result + system
2026UCLA2-0HC: Bob Chesney · Run-heavy, slow tempo
Where this defender ranks vs the field
Box-score production percentiles vs the position cohort
Concern: tackles (0th percentile).
Box-score production (6)
Percentiles are versus same-position peers with enough snaps this season, based on box-score production. There are no play-by-play efficiency bars here: CFBD's play-value model credits offensive players only, so no defensive EPA exists to rank.
Splits & context
Splits
Per-game splits
Through 1 game: 1.0 TKL/g, 0.0 TFL/g, 0.0 SACK/g, 0.0 PD/g — splits start at 3 games.
Supporting cast · Scheme
Staff and system around the player
Head Coach
Bob Chesney
Scheme reads (pass share, tempo, sack rate) need at least 3 team games — 2 games in so far.
Awards
Player standing · 2026
Backup
On the two-deep and pushing for snaps.
Roster2-deepStarterRecognizedEliteApex
Career stats
| Season | Team | |||||||
|---|---|---|---|---|---|---|---|---|
| 2026 | UCLA | 1 | 1 | 0.0 | 0.0 | -- | -- | -- |
| Career | 1 | 1 | 0.0 | 0.0 | -- | -- | -- |
Game log
How he plays
2026 Outlook
UCLA
2026 Depth chart
Projected starter
Defensive back · UCLA
Returning around him
- Transfer portal: +14 net (43 in / 29 out)
2026 Award watch
No preseason watch lists yet (most drop June 15 – July 15)
UCLA · Last season: 3-9 · Talent rank #25 · 2026 recruiting class #62
The secondary · UCLA
- #4Cole Martin65 tackles · 2025
- #6Tao Johnson50 tackles · 2025
- #1Scooter Jackson44 tackles · 2025
- #32DJ Barksdale36 tackles · 2025
- #28Mason Rivera1 game · 2026
18 more on the roster · UCLA team page
Stats from CFBD · ESPN · fan discourse. Every figure computed from source tables — not invented. Methodology