The Mariners have designated first baseman Ji-Man Choi for assignment, the team announced. The move creates a 40-man roster spot for left-hander Edgar Olmos, who was returned to the M’s from the Rangers after Texas’ waiver claim on the southpaw was reversed.

Choi’s roster situation will likely be resolved by a trip to the 60-day disabled list, as he broke his right fibula during a Spring Training game on Wednesday. He underwent surgery today and is expected to be out for four to six months.

Since joining Seattle’s farm system in 2010, Choi has a .304/.407/.492 slash line and 42 homers over 1470 minor league plate appearances. Baseball America ranked Choi as the 25th-best prospect in the Mariners’ system prior to the 2014 season, but in April he was issued a 50-game suspension after testing positive for methandienone.