Washington Nationals ace pitcher Stephen Strasburg could miss his next start after manager Davey Johnson admitted that Strasburg has been dealing with tightness in his right forearm.

Strasburg has been inconsistent so far this year. He has just one win and four losses in six games, with a 3.13 earned run average. In his latest outing, Strasburg gave up two runs on six hits in six innings Monday as the Nationals lost to the Braves, 3-2, in Atlanta.

The 24-year-old famously was held to a strict innings limit last year after undergoing Tommy John surgery as a rookie in 2010. It was thought at the time that the innings limit would preserve Strasburg's long-term health, but now he's injured again.