 For the rest of the 2005 season, he would pitch for the Mariners Triple A team, the Tacoma Rainiers including 2 starts in the postseason for them.Foppert played in just 5 games for the Rainiers in after spending most of the season on the disabled list.Foppert was released on March 19, from the Mariners after failing to make the club as a nonroster invitee.