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CAL STATE SAN MARCOS COUGARS
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2025 Baseball Roster

Greg Siller
Greg Siller
Greg Siller

27 Preston Kelly

27 Preston Kelly

  • Position:
    Right-Handed Pitcher
  • Class:
    Redshirt Junior
  • Height:
    5-10
  • Weight:
    190
  • Hometown:
    Eastvale, Calif.
  • Prev School:
    Chino Hlls HS

Summary

Biography

ACADEMIC AWARDS
  • CSC Academic All-District (2024)
  • D2 ADA Academic Achievement Award (2020-21, 2022-23, 2023-24, 2024-25)
  • CCAA All-Academic (2019-20, 2020-21, 2022-23)
  • CCAA Spring Academic Honor Roll (2021, 2024)
  • Big Blue Award (Fall 2019, Spring 2020, Fall 2020, Spring 2021, Fall 2021, Fall 2022)

ATHLETIC AWARDS
  • ABCA/Rawlings All-West Region (2nd Team - 2024)
  • NCBWA All-West Region (2nd Team - 2024)
  • All-CCAA first team (2024)
  • All-CCAA honorable mention (2023)

AS A REDSHIRT JUNIOR IN 2025
  • Did not play.

AS A REDSHIRT SOPHOMORE IN 2024
  • Made 23 relief appearances.
  • Finished with a 5-1 record, seven saves, a 3.92 ERA, a 1.23 WHIP and 34.0 strikeouts in 39.0 innings.
  • Threw a career-high six strikeouts in a career-high 4.2 innings against San Francisco State (May 9).
  • Seven saves led the CCAA and ranked 31st nationally.

AS A REDSHIRT FRESHMAN IN 2023
  • Made 19 relief appearances.
  • Finished with nine saves, a 1-0 record, a .88 WHIP, a 2.42 ERA and 25 strikeouts in 26.0 innings.
  • His nine saves ranked seventh nationally and were the second most in program history.
  • Tied his career high for strikeouts on three different occasions with three.
  • Tossed 3.0 innings against Cal State San Bernardino (March 5) and Cal State Dominguez Hills (March 10).

AS A REDSHIRT FRESHMAN IN 2021
  • Season canceled due to the COVID-19 pandemic.

AS A FRESHMAN IN 2020
  • Made six relief appearances.
  • Tossed four strikeouts in 10 innings of work.
  • Posted the third-lowest WHIP on the team at 1.70 with an ERA of 6.30.
  • Had season highs for strikeouts (3) and innings pitched (3.0) against Sonoma State (Feb. 29).
  • Remainder of 2020 season was canceled on March 12 due to the COVID-19 pandemic.

HIGH SCHOOL
  • 2019 graduate of Chino Hills High School in Chino Hills, California.
  • Played for coach Robert Palmer.
  • Was named Rookie of the Year and earned All-Baseline League first team honors in 2017.
  • Earned All-Baseline League second team honors in 2019.
  • Earned the Cy Young in 2018 and 2019.
  • Had a Distinguished Scholar GPA and was a Scholar Athlete from 2017 to 2019.
  • Had a career ERA of 2.29 with 15 wins, 159 innings and 115 strikeouts while hitting .280 his senior year.
  • Also played football.

CLUB
  • Played for the SoCal Renegades and JG Diplomats from 2017 to 2019 and CBA from 2016 to 2017.
  • Won the Wyoming World Series Championship in 2018 and the Gates Utah World Series Championship in 2017.

PERSONAL
  • Born in Claremont, California.
  • Hometown is Eastvale, California.
  • Son of Harry Kelly and Lisa Fontes-Kelly.
  • Has three younger sisters, Payton, Penley and Parker.
  • Wants to get an internship in business and try working in the food industry after graduating.
  • Enjoys video games, swimming and golf.
  • Favorite movie is The Wolf of Wall Street.
  • Favorite athlete is Nolan Ryan.
  • Favorite food is chicken tenders.
  • His greatest influence his dad and grandpa.
  • Roots for the Los Angeles Dodgers.
  • Pregame superstition is not stepping on the baseline.
  • Most memorable moment is throwing a complete game at Quakes Stadium his sophomore year of high school.
  • Loves to travel and try new foods.
  • Gives back to the community by tutoring and taking part in church events.
  • Majoring in Business Administration.
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Season Stats

Season:
2025
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Historical Player Information

  • 29

    2020Freshman

    Right-Handed Pitcher
    5'9" 170 lbs
    29
  • 29

    2021Redshirt Freshman

    Right-Handed Pitcher
    5'9" 170 lbs
    29
  • 27

    2023Redshirt Freshman

    Right-Handed Pitcher
    5'10" 190 lbs
    27
  • 27

    2024Redshirt Sophomore

    Right-Handed Pitcher
    5'10" 190 lbs
    27
  • 27

    2025Redshirt Junior

    Right-Handed Pitcher
    5'10" 190 lbs
    27