Red Sox put reliever Hill on DL
Hill had Tommy John surgery on the elbow a year ago and will be examined on Monday.
Hill (1-0) has made 17 relief appearances this season and has an ERA of 2.63 ERA over 13 2-3 innings.
Melancon has been at Pawtucket since the Red Sox optioned him there on April 18. He has 11 saves with the PawSox.