Kieran Yohance Mattison
- Bats Left, Throws Right
- Height 6' 0", Weight 205 lb.
- School East Carolina University
- High School Westside High School
On April 1, 2009, Kieran Mattison made his CPBL debut with the Sinon Bulls, allowing five baserunners and 2 runs in 2 innings against the Uni-President Lions but getting the win in a 8-7 slugfest. He was 1-1 with a save and a 3.86 ERA in 6 games then was released to make room for Pedro Liriano. He was named head coach of the Paris Université Club for 2013, succeeding Jeff Stoeckel. He coached for the French national team in the 2014 European Championship and 2017 World Baseball Classic Qualifiers.
Year-By-Year Managerial Record
|2017||DSL Pirates||Dominican Summer League||36-34||Pittsburgh Pirates|
|2018||West Virginia Black Bears||New York-Penn League||32-44||12th (t)||Pittsburgh Pirates|
|2019||Bristol Pirates||Appalachian League||34-33||4th||Pittsburgh Pirates||Lost in 1st round|
|2021||Greensboro Grasshoppers||High-A East||74-46||2nd||Pittsburgh Pirates||Lost League Finals|
|2022||Altoona Curve||Eastern League||Pittsburgh Pirates|