(7-30-25) Seth Lonsway, a Celina High School graduate and former Ohio State pitcher, has been promoted to Triple-A Sacramento within the San Francisco Giants organization. In 2025, Lonsway posted a 3-8 record with a 3.52 ERA in 19 starts at Double-A Richmond, recording 84 strikeouts and 42 walks.
Seth Lonsway Whiffs vs Erie
Lonsway was drafted by the Giants in the sixth round of the 2021 MLB Draft and is now just one step away from the majors with the Sacramento River Cats, the Giants’ Triple-A affiliate in the Pacific Coast League.
Seth Lonsway S5 E5
Here are the minor league teams Seth Lonsway has played for within the San Francisco Giants organization:
Minor League Teams
Based on career data from MiLB.com, The Baseball Cube, and StatsCrew, Lonsway’s minor league path includes the following teams:
ACL Giants Orange (Rookie-level Arizona Complex League – assigned in late 2021)
San Jose Giants (Single-A California League – in 2022) Eugene Emeralds (High-A Northwest League – during 2023 and 2024)
Scottsdale Scorpions (Arizona Fall League – Fall 2023)
Richmond Flying Squirrels (Double-A Eastern League – during parts of 2024 and 2025)
Career Progression
2021 – Began pro career with ACL Giants Orange (Rookie level) shortly after being drafted in June
2022 – Full season with San Jose Giants at Single-A; posted a strong 9–3 record and 4.06 ERA over 95⅓ IP
2023 – Moved to Eugene Emeralds (High-A), where he struggled initially (2–9, 5.87 ERA) but earned a Fall League stint with the Scottsdale Scorpions
2024 – Started season in High-A with Eugene, then promoted mid-season to Richmond Flying Squirrels (Double-A), where he debuted June 29, 2024 and posted excellent results (1.38 ERA over ~32.7 innings) before being injured
2025 – Returned to Richmond Flying Squirrels to begin the season, continuing at Double-A level
Stateline Sports Network 