Mariners ace Felix Hernandez (shoulder) and productive outfielder Mitch Haniger (oblique), both already on the 10-day disabled list, will miss significant time, according to a team release updating the condition of each: 

Haniger and Hernandez were placed on the 10-day disabled list on Wednesday, April 26. Both players underwent testing today in Seattle, and were examined by Mariners Medical Director Dr. E. Edward Khalfayan.

Hernandez was diagnosed with bursitis in his right shoulder. He is expected to miss three to four weeks.­­

Haniger was diagnosed with a grade 2 strain of his right oblique muscle. He is expected to miss three to four weeks.­­

Obviously, this isn't the news the M's were hoping for. Both players could miss the next month, and in Hernandez's case, shoulder injuries are uncertain things for pitchers -- especially ones in their 30s and with a lot of miles on the odometer. 

Through five starts this season, Hernandez has struggled in terms of run prevention; however, his robust K/BB ratio of 7.33 augur better days ahead, assuming he returns to full health.  

As for Haniger, he has played plus defense in right this season while putting up an outstanding line of .338/.442/.600. Acquired from the Diamondbacks as part of the Taijuan Walker-Jean Segura trade, he has been one of the few pleasant surprises in Seattle this year.