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Speedy SF Giants outfielder Jung Hoo Lee underwent an MRI on Tuesday due to a bout with back tightness. The results were encouraging and showed no structural damage, per John Shea of the San Francisco Standard.

Any time a player goes in for an MRI, it raises the level of concern about the severity of an injury. Oftentimes, an MRI confirms the severity of an injury, leading to a trip to the injured list.

That is not the case at this point in time, as Lee is expected to continue therapy and could be ready for game action before the end of the week. That would be just in time with spring training winding down.

With Lee going for an MRI, it led to questions about who would be his replacement if he spent time on the injured list. Depth is light in center field. Grant McCray is realistically the only player on the 40-man roster who has the speed, arm, and experience to be a viable option.

Heliot Ramos and Luis Matos could fill in at center field, but both have graded out as well below-average gloves at that position in their respective careers. Mike Yastrzemski has generally been passable in center field, but the Giants do not seem inclined to move him from right field, even if the need arose.

That leaves McCray. There would be a tradeoff, however. The left-handed bat struggled to a .617 OPS with a 43.1 percent strikeout rate in 130 plate appearances with the Giants last season. He has posted a .921 OPS with one home run and four RBI in 46 plate appearances this spring, but spring training stats generally do not carry much weight for the regular season. Given that center field is a premium position, the Giants likely would be willing to make the tradeoff with McCray’s bat.

For now, the Giants do not have to worry about that contingency plan. They hope Lee can get in a few more exhibition games before the regular season begins. After sustaining a season-ending shoulder injury in May last year, the left-handed bat had no restrictions this spring. He has tallied nine hits, including five RBI, in 30 Cactus League at-bats.