Nationals placed LHP Gio Gonzalez on the 15-day disabled list with left shoulder inflammation. Gonzalez was set to undergo an MRI Sunday, and the injury designation would indicate that the exam came back clean. However, he's going to need at least a couple weeks off. It's the first time Gonzalez has ever been on the disabled list, but he did miss a few days in spring training with a sore shoulder and also had a bout of soreness back in 2009. Blake Treinen is likely to take his spot in the rotation.