MOBILE, AL - JANUARY 28: NFL Network Draft Expert Mike Mayock walks the sidelines before the start of the 2017 Resse's Senior Bowl at Ladd-Peebles Stadium on January 28, 2017 in Mobile, Alabama. The South defeated the North 16-15. (Photo by Don Juan Moore/Getty Images)
To build a solid roster throughout, a good general manager must utilize the NFL Draft, as well as free agency. For Las Vegas Raiders general manager Mike Mayock, his returns have been up and down, as he has struggled in free agency, but has brought in some quality talent via the draft.