Draft Signings: Mathisen, Maxwell, Cardinals

Here are Saturday’s notable non-first round draft pick signings…

The Pirates have agreed to sign second rounder Wyatt Mathisen according to Rob Biertempfel of The Pittsburgh Tribune-Review (on Sulia). Tim Williams of Pirates Prospects first reported the agreement. The high school catcher from Texas was the 69th overall pick, which carries a slot value of $746K.
The Athletics have signed second rounder Bruce Maxwell for a below slot $770K, reports Jim Callis of Baseball America (on Twitter). The college bat was slotted for $831K.  Maxwell is represented by Matt Sosnick and Adam Karon of Sosnick Cobbe Sports.
In …