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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

Kirra Robusto
Greg Siller
Greg Siller

13 Conner Gleissner

13 Conner Gleissner

  • Position:
    Left-Handed Pitcher
  • Class:
    Redshirt Senior
  • Height:
    6-0
  • Weight:
    180
  • Hometown:
    Goleta, Calif.
  • Prev School:
    Dos Pueblos HS

Summary

Biography

ACADEMIC AWARDS
  • D2 ADA Academic Achievement Award (2021-22, 2022-23, 2023-24, 2024-25)
  • CCAA All-Academic (2022-23, 2023-24, 2024-25)
  • CCAA Spring Academic Honor Roll (2023, 2024)
  • Big Blue Award (Fall 2021, Fall 2022)
  • Cougar Award (Fall 2020)

AS A REDSHIRT SENIOR IN 2025
  • Made 10 appearances with one start.
  • Threw 14 strikeouts in 16.1 innings.
  • Recorded a season-high three strikeouts against Cal State LA (March 2).
  • Pitched a season-high 4.0 innings against Chico State (April 26).

AS A REDSHIRT JUNIOR IN 2024
  • Appeared in eight games and made five starts.
  • Finished with a 3-3 record in 31.1 innings.
  • Recorded a season-high six strikeouts on four occasions.
  • Threw a career-high 7.0 innings while striking out six and allowing one unearned run on six hits and a walk in a win against Cal State LA (Feb. 24).

AS A REDSHIRT SOPHOMORE IN 2023
  • Made 11 starts.
  • Finished the season with a 1-4 record, 5.53 ERA and 43 strikeouts in 55.1 innings.
  • Threw a career-high eight strikeouts while allowing just three hits and one walk in 5.0 innings against Montana State Billings (Feb. 9).
  • Tossed a career-high 6.0 innings on four different occasions.
  • Earned his lone win of the season by throwing six strikeouts while allowing one run on a hit, walk and hit-by-pitch at Concordia (Feb. 17).

AS A REDSHIRT FRESHMAN IN 2022
  • Made a team-high 21 appearances with five starts.
  • Ended the season with a 2-4 record after throwing 43 innings with 28 strikeouts.
  • Punched out a season-best five batters on two occasions.
  • Pitched a season-high 5.1 innings to go along with five strikeouts against Cal State Dominguez Hills (March 13).

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

HIGH SCHOOL
  • 2020 graduate of Dos Pueblos High School in Goleta, California.
  • Played for coach George Hedricks.
  • Was a two-time Pitcher of the Year and an All-Channel League second-team honoree.
  • Lifetime member of the National Honor Society.
  • Also played football.
  • Part of the Student Body Leadership.

PERSONAL
  • Born and raised in Goleta, California.
  • Son of Michelle and Konrad Gleissner.
  • Has one older sister, Kelly.
  • Plans to be an on-base firefighter in the Air Force after graduating.
  • Enjoys surfing, skating, lifting and hanging out with friends.
  • Favorite movies are Nacho Libre, Deadpool 1 and 2, and Chasing Mavericks.
  • Favorite athletes are Clayton Kershaw and Blake Snell.
  • Favorite foods are tri-tip, Nutter Butters and macaroni and cheese.
  • Greatest influence is Dwayne "The Rock" Johnson.
  • Roots for the Los Angeles Dodgers, Rams and Kings.
  • Has to listen to "Stargazing" by Travis Scott before every start.
  • Most memorable moment is getting to play baseball in Louisiana and hitting a walk-off homer in the Sweet 16 round in Cooperstown when he was 12.
  • Has a Secata tortoise named Devonte McQueen Jr.
  • Majoring in Kinesiology.
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Stat Snapshot (Career)

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APP
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Season Stats

Season:
2025
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Career Stats

Career Statistics

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Historical Player Information

  • 2021Freshman

    Left-Handed Pitcher/First Base
    6'0" 180 lbs
  • 37

    2022Redshirt Freshman

    Left-Handed Pitcher
    6'0" 180 lbs
    37
  • 13

    2023Redshirt Sophomore

    Left-Handed Pitcher
    6'0" 180 lbs
    13
  • 13

    2024Redshirt Junior

    Left-Handed Pitcher
    6'0" 180 lbs
    13
  • 13

    2025Redshirt Senior

    Left-Handed Pitcher
    6'0" 180 lbs
    13