Center fielder Jung Hoo Lee will undergo an MRI exam on his tight back on Monday, a concerning development for the Giants as they enter the final week of Cactus League play. Lee was slated to start Saturday’s game against the Mariners,

The Giants announced on Monday morning that Lee will undergo an MRI later in the day as the center fielder deals with mid-back tightness. Lee will have a follow-up with team orthopedist Ken Akizuki for another exam, as well. “It hasn’t gotten any better,” said manager Bob Melvin. “Send him in, get an MRI, see what’s there.”

San Francisco Giants outfielder Lee Jung-hoo is set to undergo an MRI exam on his back this week with the start of his sophomore campaign in MLB just days away.