Mitch Haniger is expected to miss the start of the regular season and likely needs to have core-muscle surgery, according to the Seattle Mariners.

Haniger suffered the injury during one of his offseason workouts earlier this week.

"I was expecting him to show up for the first day of spring training ready to go but that does not appear to be the case," Jerry Dipoto said.

Haniger missed the final 3 1/2 months of the season after suffering a ruptured testicle and then experiencing back and core issues during his recovery. He was limited to 63 games in 2019.