Grissom (oblique) has been taking light swings and participating in light baseball activities, per MLB.com.
Grissom hasn't played since June 5, and he landed on the IL with a left oblique strain June 8. Given the nature of his injury, it's a promising sign that he's now able to swing a bat, albeit not at full capacity. It's not yet clear how long Grissom will be sidelined, though it seems likely that he'll need more than a minimum stay on the injured list.