...is a strained flexor tendon in Stephen Strasburg's right forearm.
I'm no doctor, and the actual diagnosis won't take place until he undergoes an MRI on Sunday, but it seems to be something less horrific than many of us originally imagined.
Nonetheless, you have to wonder whether or not the ballclub will take this opportunity to let him watch the rest of the season from the sidelines. It doesn't seem to be part of his makeup to want to do that, but the decision won't be his to make.
On the plus side, the bullpen continues to impress. Left-hander Doug Slaten, one of the more unsung members of the relief corps, has been remarkably steady since he came up from Syracuse in May. He's allowed earned runs in only 8 of 37 appearances with the Nationals.
Perhaps we'll see the return of the "I'm a Slaten Worshipper" T-shirts we saw in Arizona in 2007.