The Cardinals formally announced the signing of supplementary first rounder Seth Blair, according to MLB.com's Matthew Leach (via Twitter). The Cards selected the 21-year-old right-hander 46th overall in last month's draft. Three years ago, the A's selected Blair in the 47th round, but he attended Arizona State instead.
The Cardinals signed Blair for $751,500, according to Baseball America's Jim Callis. That matches MLB's slot recommendation.