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Data updatedOct 31, 2026
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Ty Dieffenbach stats, 2026

UCLA (7–0, Big Ten). Quarterback. 2026 season, games through Oct 24, 2026.

Ty Dieffenbach is a quarterback for UCLA (7–0). Among quarterbacks this season he's 95th in yards per attempt (7.3), 106th in completion % (61.4%), 113th in passing success rate (40.3%), in 3 games. This week: Nevada at UCLA.

Passing yards513150th of 209 quarterbacks
Passing TDs2175th of 197 quarterbacks
Completion %61.4%106th of 172 quarterbacks
Yards per attempt7.395th of 172 quarterbacks

Bio

Who is Ty Dieffenbach?

Position
Quarterback
Class
Junior
Height
6-6
Weight
227 pounds
Number
No. 14
Hometown
Calabasas, CA
High school
Agoura (Agoura Hills, CA)
Recruiting
3-star, No. 1646 in the 2023 class, signed with Pittsburgh
Transfers
Cal Poly to UCLA (2026)

From the 2026 roster, the 247Sports recruiting composite and the transfer portal, all via CollegeFootballData.com.

The season

Ty Dieffenbach's passing stats

He's 95th of 172 quarterbacks in yards per attempt (7.3) and 106th of 172 quarterbacks in completion % (61.4%).

StatSeasonNational rank
Passing yards513150th of 209
Passing TDs2175th of 197
Interceptions thrown1—
Completion %61.4%106th of 172
Yards per attempt7.395th of 172

The season

Ty Dieffenbach's passing efficiency

He's 27th of 173 quarterbacks in sack rate (2.8%) and 113th of 172 quarterbacks in passing success rate (40.3%).

StatSeasonNational rank
Passing success rate40.3%113th of 172
EPA per play0.15125th of 207
Sack rate2.8%27th of 173

The season

Ty Dieffenbach's rushing stats

He's 164th of 209 quarterbacks in carries (13) and 183rd of 207 quarterbacks in rushing yards (19).

StatSeasonNational rank
Rushing yards19183rd of 207
Carries13164th of 209

Ranks are among every FBS quarterback with the stat this season. Rates need a minimum sample (50 dropbacks for passing rates, 20 carries, 8 catches). From the play-by-play.

Career

Ty Dieffenbach's career stats

SeasonTeamComp.Att.Comp. %Pass ydsPass TDINTRush ydsRush TD
2025Cal Poly9216256.8%1,305993214
2026UCLA437061.4%51321190
Career13523258.2%1,81811103404

Past seasons (back to 2022) from CollegeFootballData.com; 2026 from the play-by-play, games through Oct 24, 2026.

By school

How did Ty Dieffenbach do at Cal Poly and UCLA?

Cal Poly (2025) is where he's been best: his best on 5 of the 7 rates below. That's a passing success rate of 42.6% (40.3% at UCLA), +0.34 EPA per play (+0.15) and 8.1 yards an attempt (7.3). His weakest stretch was UCLA this season: a passing success rate of 40.3% and +0.15 EPA per play. His biggest season for passing yards was 2025 at Cal Poly, with 1,305. The UCLA numbers are 2026 so far, through Oct 24, 2026. The rates compare fairly with his other seasons; the totals are still growing.

Passing yards by season
2025, Cal Poly: 1,3051,30520252026, UCLA: 5135132026*
Passing success rate
Cal Poly, 2025: 42.6%42.6%2025UCLA, 2026: 40.3%40.3%2026*
EPA per play
Cal Poly, 2025: +0.34+0.342025UCLA, 2026: +0.15+0.152026*
Yards per attempt
Cal Poly, 2025: 8.18.12025UCLA, 2026: 7.37.32026*
SchoolSeasonsComp.Att.Comp. %Pass ydsPass TDINTRush ydsRush TDPass successExplosive passesRush success
Cal Poly20259216256.8%1,30599321442.6%16.9%42.6%
UCLA2026 (so far)437061.4%5132119040.3%12.9%—

* 2026 so far, through Oct 24, 2026.

Totals for his seasons at each school; rates worked out from those totals. Success and explosive rates count every play; EPA per play leaves out garbage time. Rates need the same minimum sample as the season stats.

Advanced

Ty Dieffenbach's advanced stats by season

SeasonTeamEPA/playPass EPA/playRush EPA/playPass successExplosive passesRush successTotal EPAUsage
2025Cal Poly+0.34+0.33+0.4442.6%16.9%42.6%75.144%
2026UCLA+0.15+0.22-0.2140.3%12.9%—13.138%

EPA per play is the expected points a player adds on each of his plays (0 is average; glossary). Success means the play stayed on schedule: half the yards to go on first down, 70% on second, all of them on third or fourth. Explosive means a run of 12+ yards or a completion of 16+, as a share of his throws, carries or catches. Usage is the share of his team's plays that went to him. EPA and usage leave out garbage time; success and explosive rates count every play. From CollegeFootballData.com and cfbfastR.

Game log

Ty Dieffenbach's game log, 2026

WeekOpponentResultPassing yardsPassing TDsInterceptions thrownRushing yards
6UCLA4310-2
7vs. WisconsinW 17–7270014
8vs. Michigan StateW 28–102001017

FAQ

Questions about Ty Dieffenbach

What position does Ty Dieffenbach play?

Ty Dieffenbach plays quarterback for UCLA, which is 7–0 this season.

Where has Ty Dieffenbach played?

Cal Poly (2025) and UCLA (2026).

Where is Ty Dieffenbach from, and what year is he?

Ty Dieffenbach is a junior quarterback for UCLA, listed at 6-6 and 227 pounds, from Calabasas, CA.

How tall is Ty Dieffenbach, and how much does he weigh?

Ty Dieffenbach is listed at 6-6 and 227 pounds on UCLA's 2026 roster.

What year is Ty Dieffenbach?

Ty Dieffenbach is a junior, from the 2023 recruiting class.

What are Ty Dieffenbach's career stats?

Over 2 seasons (2025–2026), Ty Dieffenbach has 1,818 passing yards, 11 touchdown passes and 10 interceptions, plus 340 rushing yards.

Who does Ty Dieffenbach play for?

UCLA (7–0, Big Ten), where he plays quarterback and wears No. 14.

Is Ty Dieffenbach eligible for the NFL Draft?

Yes. Players can enter the NFL Draft three years after high school, and Ty Dieffenbach was in the 2023 class, so he's eligible for the 2027 draft.

How did Ty Dieffenbach play in his last game?

Week 8 vs. Michigan State: 200 passing yards, 1 passing TD, 17 rushing yards. UCLA won 28–10.

Where did Ty Dieffenbach go to high school?

Agoura (Agoura Hills, CA). He was a 3-star recruit, No. 1646 in the 2023 class, signed with Pittsburgh.

Is Ty Dieffenbach a transfer?

Yes. He transferred from Cal Poly to UCLA (2026).

What are Ty Dieffenbach's stats this season?

513 passing yards, 2 passing TDs, 1 interceptions thrown, 61.4% completion %, 7.3 yards per attempt in 3 games, through Oct 24, 2026.

How does Ty Dieffenbach rank nationally?

Among FBS quarterbacks: 95th of 172 in yards per attempt, 106th of 172 in completion %, 113th of 172 in passing success rate.

When does Ty Dieffenbach play next?

UCLA hosts Nevada Sat, Oct 31, 4:15 PM ET on BTN. The numbers' pick: UCLA.

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