According to AZCentral D’Backs beat writer Nick Piecoro, manager Torey Lovullo announced that Paul Sewald suffered a Grade 2 ...

Closer Paul Sewald has a strained left oblique and will open the season ... he said tests performed on Sewald showed a Grade 2 strain, which can often sideline players for roughly 6 to 8 weeks.

He could have potentially graduated from his prospect status last season, but he sustained a Grade 2 oblique strain after one start last season and missed a couple months before returning to Triple-A.