2023 @ NW-Nazarene
- 4 GP 6.75 ERA
- 9 GP with Duluth of the Northwoods League
2022 Season (Junior) @ CSUN
Casillas did not play in any games during the season.
Mt. San Antonio College
Casillas played his sophomore season in 2021 at Mt. SAC ... Started seven games on the mound, sporting a 2-1 record with a 4.18 ERA and 33 strikeouts ... Logged 28 total innings for the season ... Made 25 appearances in the field primarily at first base ... Slashed .333/.417/.608 at the plate ... Registered 17 hits, 16 RBI, seven walks, six runs and a home run ... Helped Mt. SAC to a winning record in 2021.
Colorado Northwestern CC
Spent the 2020 season with the Spartans and served as a pitcher and infielder ... Made seven appearances on the mound, starting five times as he posted a 2.15 ERA with 24 strikeouts over 29.1 innings ... Played 21 games in the field and batted .283 with 16 RBI, 15 hits and seven runs scored.
Walnut High School
Casillas sported a 2.92 ERA in his senior season ... Tossed a complete game one-hitter in 2019 vs. Claremont ... Graduated in 2019.
- Manny is from West Covina, California
- Son of Nedy Casillas and Manuel Casillas
- Has one sister, Destiny