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 |
#28
Mason Rivera
Senior defensive back on UCLA's 2026 roster.
6′0″ · 190 lb · Tracy, CA · Kimball HS / Cal Poly
The story
Senior 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
—
Career stats
| Season | Team | |||||||
|---|---|---|---|---|---|---|---|---|
| 2026 | UCLA | 1 | 1 | 0.0 | 0.0 | -- | -- | -- |
| Career | 1 | 1 | 0.0 | 0.0 | -- | -- | -- |
Game log
Signature game
SIGNATURE GAME · Week 1 · 2026
W 45–24
at California
1 tackles · 1 solo tackles
Dominant 21-point win on the road against California.
With C. Gerrand — 43 yards per punt · 5 punts · 3 inside the 20 · W. Knight — 71 rush yds (8 car) · 3 TD
2026 snapshot
Season context · Team result + system
2026UCLA3-0HC: Bob Chesney · Run-heavy
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
Pass share
39.0%
76 pass / 119 run
Plays / game
65.0
3 games
Team sack rate
5.7%
87 dropbacks · PBP
Scheme: Run-heavy.
Awards
Player standing · 2026
Backup
On the two-deep and pushing for snaps.
Roster2-deepStarterRecognizedEliteApex
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