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Cal State San Marcos Athletics

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CAL STATE SAN MARCOS COUGARS
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2025 Baseball Roster

Greg Siller
Greg Siller
Greg Siller
Greg Siller
Greg Siller
Greg Siller
Ali Hoffman
Greg Siller
Greg Siller

12 Ethan Rivera

12 Ethan Rivera

  • Position:
    Catcher/First Base
  • Class:
    Redshirt Senior
  • Height:
    6-1
  • Weight:
    210
  • Hometown:
    Chino Hills, Calif.
  • Prev School:
    Ruben S. Ayala HS

Summary

Biography

ACADEMIC AWARDS
  • CCAA All-Academic (2024-25) 
  • Cougar Award (Fall 2020, Spring 2021)

ATHLETIC AWARDS
  • ABCA/Rawlings All-West Region second team (2022)
  • NCBWA All-West Region honorable mention (2024)
  • All-CCAA second team (2022, 2024)

AS A REDSHIRT SENIOR IN 2025
  • Played in 44 games and made 39 starts.
  • Hit .281 with 38 hits, 22 runs, 16 RBIs, 14 walks, seven doubles, a .378 on-base percentage and a .333 slugging percentage.
  • Recorded a season-best two RBIs in five games.

AS A REDSHIRT JUNIOR IN 2024
  • Played and started in 46 games.
  • Hit .368 with a .922 OPS, 56 hits, 34 RBIs, 31 runs, 22 walks, nine doubles, two home runs, a .467 slugging percentage and a .455 on-base percentage.
  • Tallied 17 multi-hit and 10 multi-RBI games.
  • Batting average was the third highest in the CCAA.
  • Tallied a career-high four hits in four at-bats while recording three runs, two RBIs and a double at Cal Poly Pomona (April 14).
  • Recorded a career-high six RBIs while going 3-for-6 with two home runs at Cal State Dominguez Hills (March 1).

AS A REDSHIRT SOPHOMORE IN 2023
  • Started all 45 games.
  • Led CSUSM with 30 RBIs.
  • Hit .271 with a .693 OPS, 45 hits, 17 runs, 11 walks, eight doubles, two home runs and a triple.
  • Led the Cougars with 16 multi-hit games and 10 multi-RBI contests.
  • Tallied a season-high three RBIs against Montana State Billings (Feb. 11) and Cal State LA (March 19).
  • Posted a season-best two hits in 16 contests.

AS A REDSHIRT FRESHMAN IN 2022
  • Played and started in 42 games.
  • Led the team with 40 RBIs and a conference-leading seven sacrifice flies while hitting .338 with an .809 OPS, a .444 slugging percentage, a .365 on-base percentage, 54 hits, 40 RBIs, 27 runs, 11 doubles, 11 walks, three stolen bases and two home runs.
  • Tallied 16 multi-hit games and led the team with 11 multi-RBI games.
  • Posted a season-best five RBIs while going 3-for-5 with two doubles and a run against Cal State LA (March 7).
  • Was the sixth-toughest player to strikeout in the CCAA with a strikeout every 10.7 at-bats.

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

HIGH SCHOOL
  • 2020 graduate of Ruben S. Ayala High School in Chino Hills, California.
  • Played for coach Christopher Vogt.
  • Earned All-Palomares League first-team honors in 2018.
  • Threw 103 innings with an 8-4 record, a 2.24 ERA and a .984 fielding percentage while batting .294 for his career.
  • Helped his team to the CIF Semifinals in 2018 and CIF Quarterfinals in 2019.

CLUB
  • Played for SGV Arsenal.

PERSONAL
  • Born and raised in Chino Hills, California.
  • Son of Marylou and Saul Rivera.
  • Has one younger sister, Isabelle.
  • Plans to go into physical therapy after graduating.
  • Interests include politics, video games, hiking and biking.
  • Favorite movies are all the Star Wars and Harry Potter movies.
  • Favorite athlete is Marcus Stroman.
  • Favorite food is pizza.
  • His parents are his greatest influence.
  • Roots for the Los Angeles Dodgers.
  • Most memorable moment is winning the Loara Tournament and beating La Mirada 6-3.
  • Enjoys the mountains over the beach.
  • Majoring in Kinesiology.
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Stat Snapshot (Career)

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Season Stats

Season:
2025
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Career Stats

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Historical Player Information

  • 2021Freshman

    Catcher
    6'0" 210 lbs
  • 12

    2022Redshirt Freshman

    Catcher
    6'0" 210 lbs
    12
  • 12

    2023Redshirt Sophomore

    Catcher
    6'1" 210 lbs
    12
  • 12

    2024Redshirt Junior

    Catcher/First Base
    6'1" 210 lbs
    12
  • 12

    2025Redshirt Senior

    Catcher/First Base
    6'1" 210 lbs
    12