Seth A. Blair
- Bats Right, Throws Right
- Height 6' 2", Weight 190 lb.
- School Arizona State University
- High School Rock Falls High School
Seth Blair was a supplemental first-round draft pick in the 2010 amateur draft.
Blair played for the USA in the 2005 World Youth Championship. He was 34-8 with 8 saves in high school, hitting .432 with 97 steals as well. He captained both the baseball and basketball teams as a senior. The Oakland Athletics took him in the 47th round of the 2007 amateur draft.
As a freshman, Blair was 4-2 with a save and a 6.96 ERA for ASU. He had an excellent summer, going 4-1 with a 1.55 ERA for the Cotuit Kettleers of the prestigious Cape Cod League, finishing third in the circuit in ERA.
As a sophomore, Blair improved to 7-2, 3.39 with a save. He made honorable mention All-Pacific-10 Conference. He started 2010 12-0 with a 3.06 ERA, winning Pac-10 Pitcher of the Year honors. The St. Louis Cardinals took him 46th in the 2010 amateur draft; he was their second pick after Zack Cox. The choice was compensation for the loss of Mark DeRosa.
He pitched in the minor leagues from 2011 to 2014, peaking with 6 games in AAA that final season. However, he was generally a disappointment, as his career was ERA was 5.34 in 84 games.