The oft-injured Hart played in only 68 games for the Mariners in 2014, batting .203 with six home runs, nine doubles and 21 RBI. However, he is a career .271 hitter with a .480 slugging percentage.
The 43-year-old hit just .133 over 60 at-bats last season. While general manager Chris Antonetti said he wouldn't completely rule out a reunion, he added that Giambi is a tough fit on the roster at this point. Giambi had been a coaching candidate a few offseasons ago, and could look to go that route if this is the end of his playing career.