The Mariners have re-instated Jesus Montero to their 40-man roster and designated pending free agent Corey Hart for assignment in order to make room, according to Bob Dutton of the Tacoma News Tribune (Twitter link).
Because Hart is a pending free agent, the move is a largely procedural one; he’d have been off the team’s 40-man roster following the postseason anyway and wasn’t a candidate for a qualifying offer base on a down season. The former Brewer batted just .203/.271/.319 in his lone season with the Mariners — a clear disappointment for a team that was undoubtedly hoping to have secured something closer to the .279/.343/.514 batting line he posted from 2010-12 in Milwaukee. Anything close to that production would’ve made his $6MM base salary a bargain, but Hart was a known risk after missing all of 2013 due to a pair of knee surgeries.