NEW YORK--(BUSINESS WIRE)--U.S. energy and metals/mining defaults are likely to continue through the summer as commodity price weakness keeps those industries in the spotlight, says Fitch Ratings. The corporate default outlook outside of those affected by the weak commodity price environment remains much healthier. There are several defaults, including Alpha Natural Resources, Hercules Offshore Inc., Samson Resources Corp. and Arch Coal Inc., that would likely increase the overall August traili