Collman, who is based in Texas, was promoted from a Midwest area scouting spot to Midwest supervisor. He has been with the Mariners since 2012 after previously working as the scouting coordinator for Perfect Game USA.
Pelekoudas, who has been with the Mariners since 2003 and is based out of Arizona, was promoted from a West area scout to West Coast supervisor. He is the son of former Mariners associate general manager Lee Pelekoudas and grandson of longtime National League umpire Chris Pelekoudas.
Moriarity, based in New Jersey, was promoted from a Northeast area scout to Northeast supervisor.