The Seattle Mariners have designated catcher Rob Johnson for assignment to make room on the 40-man major league roster for designated hitter Jack Cust, the club announced Monday.
The Mainers have 10 days to trade trade or release Johnson, or assign him outright to he minor leagues.
Johnson hit .191 last season in 61 games and 178 at-bats with the Mariners, with two homers and 13 runs batted it. Over four seasons and 161 games with Seattle, Johnson batted .200 in 470 at-bats, with five homers and 42 RBI.
In October and November of 2009, Johnson had three surgeries – on his left wrist, and to repair torn labrums in both hips.
Johnson, 28, was selected by the Mariners in the fourth round of the 2004 June draft.