Hartsfield is a former All-Atlantic Coast Conference selection for the Terrapins.
Hartsfield has fully recovered from a torn anterior cruciate ligament suffered last November.
Staples is a 6-foot-4, 245-pounder from Illinois.
Follow me on Twitter: @RavensInsider
Aaron Wilson covers the Ravens for The Baltimore Sun.Follow @footballpost on Twitter for the latest news
This story originally appeared on Nationalfootballpost.com
- American Football
- Sports & Recreation
- Green Bay Packers
- Cleveland Browns