Emerson Hancock is a right-handed starter for the Seattle Mariners who made his big-league debut in August 2023 with one clear goal: lock down a spot in Seattle’s rotation. At 27, he’s been earning it — his 2026 numbers tell the story: a 3.33 ERA, 108 strikeouts, and a 1.07 WHIP in 116.1 innings.
Quick Facts
- Full name: Emerson Hancock
- Position: Starting Pitcher
- Team: Seattle Mariners
- Number: 26
- Bats / Throws: Right / Right
- Height / Weight: 6’4″ / 214 lbs
- Born: May 31, 1999 (age 27) — Cairo, Illinois
- MLB Debut: August 9, 2023
- Country: United States 🇺🇸
Background
Hancock grew up in Cairo, Illinois, developing his arm in the Midwest before catching Seattle’s eye in the draft. The Mariners invested years of minor-league development in him, and on August 9, 2023, he finally took the mound in a big-league uniform. That debut marked the start of what looks like a genuine rotation career.
Professional Career
His first extended look came in 2024: 60.2 innings, a 4.75 ERA, 4 wins, 4 losses, and 39 strikeouts. The 1.34 WHIP showed he was still ironing out his command, but the raw stuff was clearly there.
2025 was a tougher grind — a 4.90 ERA over 90.0 innings, 4 wins, 5 losses, and 64 punchouts. Seattle kept running him out there, and the experience was clearly part of the plan.
Then came 2026, and everything clicked. Hancock went 6-6 with a 3.33 ERA, a 1.07 WHIP, and 108 strikeouts in 116.1 innings — a leap in command and efficiency that signals he’s figured out how to pitch at this level.
Career Stats
- 2026 — Seattle Mariners: 6-6, 3.33 ERA, 108 K, 1.07 WHIP, 116.1 IP
- 2025 — Seattle Mariners: 4-5, 4.90 ERA, 64 K, 1.38 WHIP, 90.0 IP
- 2024 — Seattle Mariners: 4-4, 4.75 ERA, 39 K, 1.34 WHIP, 60.2 IP
Awards and Records
No Rookie of the Year awards or All-Star nods yet. Hancock has kept his head down and focused on becoming a consistent rotation piece — and the results are starting to back that up.
Fun Fact
Hancock keeps a notably low profile on social media compared to most prospects his age. His progression from a 4.75 ERA in 2024 to a 3.33 ERA in 2026 reflects the kind of quiet, technical grind that tends to define pitchers who actually stick in the majors.
